Thanks for disappointing me. I came here expected this to be yet another boring and confusing RUclips video. I was disappointed. This is well presented, you speak very clearly, and the information is useful and coherent. Admittedly, I already knew almost everything you said having been an astronomy buff since the 70's, but it was definitely a wonderful review of the basics. Keep up the great work!
@@peakart8850 uh...nooo..... Seems you have misunderstood what I wrote. What was I expecting? Did I get what I was expecting? Or did I get something I was not expecting and thus was "disappointed"?
@@jimmo42 Well, you write positive feedback to the kind RUclipsr, but yet you say you are disappointed. I just may not be hearing you right, but if you were expecting a bad video and was surprised to see it was well presented and that the man spoke clearly, then the correct word would be, “impressed.”
And the definition of the word, “disappointed” is that you were expecting more of somebody or something, but did not receive that level of expectation.
Thanks - I figured there are some folks who are interested, but don't know how to get started and may be afraid to ask. This way they can get the basics of the terminology, where and how to look, and then ask better questions. I'm hoping that astronomy clubs may find these useful to put on their websites too, as it should help beginners get basic astronomy questions answered so newcomers will feel better informed.
Thanks dude, I'm trying. Started stargazing as a kind of therepeutic thing with some binoculars. I do struggle to orient myself, sometimes I can easily spot constellations when I'm lying down, then I move around and look up and it takes me ages to get my bearings again. This should help with that. It's really cool though, feels like I'm reconnecting with my ancient ancestors and the universe again, we are all stardust after all. It feels great to learn the constellations, once you can see them properly it's like your painting the night sky with your imagination.
You're welcome! Remember, the zenith is different depending on your latitude (and not the same as the celestial north pole); it is the point directly over your head, no matter where you are on Earth. So nadir is directly down through the ground, wherever you are, and won't point at south pole unless you're at north pole. Altitude is degrees above your own horizon; azimuth is the direction "around" that horizon. Download free program Stellarium; bottom tabs have most of these listed.
What a great video! Thank you for posting and keeping it simple! I am 51 years old and received a telescope for Christmas and trying to learn the basics before I attempt to use it!!
Im 15 and my love for astronomy i had as a child is starting to grow again. Ive been looking for information about the planets and the night sky for a week now , have installed an app to help me too. I'll buy a telescope in a few months when im completely ready!
Thank you Jim. What I was thinking was astronomy clubs might want to put them on their websites, to help people get oriented in the night sky, so they feel more educated if/when they show up to outreach events or meetings. But I also use them to supplement my own live presentations at libraries and park districts, because I cover the same concepts each time. This way people can review them at their leisure on my website or on RUclips too.
Excellent! I liked how you explained everything clearly. I'm interested in this subject but I was often fooled by fake, not-so-clear, clickbait videos. Finally found your channel & hopefully watch more videos from your channel. Added to a playlist: Astronomy, cosmos, universe. Thanks again from Great Britain. (Mon 11 Oct 2021 12h10)
Thanks for this. I'm taking an Astronomy class next semester, and this helped me wrap my head around the concept of the celestial poles. I never knew stars rotated in the sky though, I always assumed they just went from East to West like the Sun. Interesting stuff!
You're welcome. Remember, the stars don't actually rotate; it's Earth rotating that makes the stars appear to rotate over our heads. And they do go from east to west - it's jut the ones closer to the poles go in a circle. Well, they ALL go in a circle, because the Earth rotates! Make sense? :-)
Wow thanks for that! I couldn’t put into words what I was thinking to explain to someone what I was trying to understand. And the simple words of “getting oriented with the night sky” sounds so basic but is powerful thanks! 🙏🏽 🎉 🌎
Hi Charles - thanks for the thoughts. I guess I look at this way: In the story of the tortoise and the hare, the tortoise won. Maybe comparing myself to a tortoise isn't the greatest one to make, but the point is this: Over time, the views will go up. That's what matters. I'm not worried. :-)
Thanks. This explains whole lot for me. As in Contact . Jodie Foster was talking about right ascension and declination :) I had no ide what she was talking about :) Ty
David, David, David! Thank you! Now that was the best explanation and presentation I have seen on this subject. For a little over a year I've been heavily into astronomy, reading a lot and even trying to make sense of this Coursera (Duke U.) Into Astronomy Course, and you really nailed that for me. Thank you!!!
Posted eight years ago and still replying to comments, what a chad. My town uses the wrong lights so there's lots of light pollution. Terrible shame because the night sky is so beautiful, still helpful for what I can see. Thanks!
Maybe one day we can get everyone to turn off the lights together, and the world will see the wondrous cosmos that is usually hidden from their view. Ah well, probably not - but I can dream! Cheers and clear skies.
thanks so much! i have my astronomy gcse tomorrow afternoon and i really didn't understand declination and right ascension until i watched this! many thanks from the UK :D
Really enjoyed this video. Informative, straight to the point and with a friendly disposition, and fine graphics to supplement the info given. Grade A quality. Thanks!
Couldn't be explained any clearer. Crisp and clean without assuming anything about the viewer which is a rarity!. Thank you for taking the time to make these. .
That is one of the nicest compliments I have ever received. Thank you so much; I work really hard to explain things clearly without talking down to viewers.
Thanks for educating and getting me really started on star gazing...this is very nice n clear explanation. u deserve full marks. you can load more videos on this topic & astronomy in general
David, I am just getting into astronomy and found your videos. They are truly awesome, thank you for all the obvious hard work you put into them. Watching the sponsor's ads in full in the videos, thanks.
This is great ! I studied physics some years ago but never had a chance to get into Astronomy. Now I'm hiking in the wilderness more and wanted to appreciate the night sky better. Question: Can I use the position of Polaris, to determine magnetic declination for normal daytime compass use ? Seems like one could do that.
Hello Hello Happy Holidays! Thank you so much, wishing you the same. We hope this season ends on a joyful note and continues into a safe and prosperous New Year for you and your Family.
being familiar with globe ( earth ) including longitude and latitude having basic idea of earth rotation and earth"s path around the sun and moons rotation around the earth I picked up on what you described as CELESTIAL SPHERE and the idea of ZENITH and fundamental movement in sky of stars and planets ( same as sun- E to W ) good basic lesson my next step is to understand declination and ascent later
Hi David, your videos have been extremely useful in my pursuit of astronomy with my daughter. About 3 years ago I purchased Meade LX-200 10" (Schmidt-Cassegrain) with an AutoStar Upgrade and GPS. Also, I have an Equatorial Mount. My biggest issues (still today) is aligning my telescope. While I can find Polaris I'm never certain if the Stars I'm aligning to are the correct Stars. Hopefully, I've solved this problem is an iPhone App called StarChart. It would be a lot easier if I had a local club, but unfortunately thats not possible.
Andrew Beau set your mounts latitude to your latitude, level the telescope as best you can, and aim generally as close to north as you can eyeball it. That's good enough for visual observing. I have some videos on aligning and aiming equatorial mounts; check my channel. Not ideal for a fork mounted scope, but still might help.
Enjoyed your explanations on telescopes. I did bump into a little serious Astronomy, after I created DIY Barlow Lens for a Dime, took some moon shots, now I am trying to observe crescent Venus with this...there is a bit of aberration issues. I should be able to resolve it I am sue. Do find my moon shot with my own DIY telescope and J6 plus mobile. Loved your channel, continue inspiring the world..........myself an architect, musician....!!!
I just had an epiphany! Did you feel it? Excellent series. Until I found you, I would point my scope at something (the moon) and focus. It's a learning process but my goodness, your explanation makes it seem like I am a real astronomer. My friends think I am a half a bubble closer to being the cool buddy. Tonight I got a big surprise for all the mosquitos! Nobody told me about that part in the telescope store... 8-) I got eaten alive last night! A friend said turn on a fan, I hope it works.
The ecliptic has confused me David. You say lower in the summer and higher in the winter. Yet the sun is higher in the summer which follows the ecliptic - I can't work out my error. Great videos btw - they are of great interest and help
+Paul Stankevitch Common question, and a good one. Take a moment to think about Earth's orientation though. It's tilted 23.4 degrees. So in summer, your tipped towards the Sun in summer on the "day" side of Earth. But think about what you said, "the sun is higher." That's in daytime. On the "night side" you're still tilted towards the Sun; that places the ecliptic lower on the NIGHT side. And for winter, all of that is reversed. Take a globe with a light source and note your location on the globe in day/night scenarios and you'll see how that works.
Oh yes of course (revelation hits me in the face like a frying pan!) - if the summer ecliptic has more of it's length visible in the day time, there's less of it to view at night - hence closer to the horizon! David, you're a great teacher/instructor - I may yet ascend from novice to amateur :)
Sion Cable Mate, the earth is as round as a ball can be.. How anyone could believe different in the face of a myriad of evidence that proves the fact that the earth is round(amongst other objects and aspects of this universe), is beyond belief!
Sion Cable So you come to an astronomy page, who's owner and his followers not only observe the other round planets, moon and sun in our solar system, but also all use right ascension and declination to track said celestial objects while the earth rotates, supporting the fact (yes, fact) that the earth is round and not stationary. And your plan is to try to convince to us that the earth is flat? Not a great plan bro beans.
I suddenly became interested in stars when I saw a very bright star just a few days ago and It kept bothering me that I never knew what that shiny star was...your video helped but I didn't really get everything 😅 but I'm hoping to learn more... thank you for this video
Can you please explain how the northstar can be fixed in the same spot? and how come all the star constellations are the same and moving in the same pattern since the beginning of the earth as we know it? Shouldn't we see new stars all the time since we are speeding around in the universe after a moving sun? Or are the star constellations we see moving around the earth? While the earth is moving around it self and at the same time around the sun that is at the same time moving through space? I would really like to get a intellectual answer on this and also on what real scientific proofs we have of this?
Total lunar eclipse tomorror or later today depending on your time zone. Mars should also be visible near the full moon. The eclipse is less than 24 hours away. Posted at 23:34PM GMT BST 26th July 2018. The Eclipse starts Friday 27th July 2018 at about 21:21PM (Please check the real time to be sure). Full moon is at 21:20PM GMT BST.
No, it's okay. I kind of trailed off a bit when I said it, so it isn't as forcefully stated as it perhaps should be. But it's a good question to ask, and besides, now you know!
These are 3 totally different coordinate systems that are used together to track the movement. One system is oriented to the viewer, one is oriented to the planet and the other is oriented to the zodiac - or the ecliptic plane. It's too complicated to think of them as one system. Here's a 'nuther way to say it: Say, you're in a car driving around the block to go to the 7-11. You always go the same way. You pull out of your drive way and turn right (in 'Merka, or left in the U.K.). One system of orienting yourself is to look at what you are passing as you drive by. You see your neighbor's house, the house with the big scary dog, the house on the corner, the real estate office, etc. You pull into the parking lot at the store, buy some gum, then get back in the car and pull out again, turning right and drive the rest of the way around the block, passing the tattoo parlor, the crazy cat lady's house, your other next-door neighbor's house, and then pull back into your own drive way. The coordinates of the stationary or "fixed" things never change - but some people, animals, vehicles, etc. move on their own, so their locations will change. Another system of orienting yourself could be a grid system painted on your car windows, oriented to the car. So, there is a vertical line down the center of the front windshield, one vertical down the center of the back windshield, two in between the front and back side windows - maybe on the door frame - and a fixed number of lines between all 4 of those lines primary lines. Then there are horizontal lines going all the way around from the bottom edges of the front windshield, the right side windows, back windshield and left side windows; and several more horizontal lines at fixed intervals above that bottom one with the last one at the top - each all the way around. All this makes a grid pattern that is a bit warped due to the shapes and slants of the windows, and each passenger in the car will have different coordinates on this grid to locate what they see. Another system of orienting yourself is a similar grid pattern painted on a pair of goggles on your face. This system is oriented to your individual field of view. Even if everyone else in the car were to be wearing the exact same pair of goggles, they won't see what you see. No one will. And as you turn your head around, or sit in a different seat in the car, this will change the coordinates of what you see. Against these grids, you can locate stop signs, people walking and cars passing on the other side of the road, etc. as they move or don't move - *but they all move relative to you as you move.* Each of these systems has their own language and symbols and number system. Now, use all 3 at the same time. That is what is going on here. It's crazy awesome!!! 🤓👀😵🧠😁🌌🌞
Yeah cool video. I just got a free dinky little telescope and finally live in an area without light pollution. No idea what I'm doing so this is great!
At 1:35 there's a bit of a implied inaccuracy. The sun traces a line in our sky because of the rotation of the earth, not because of the the earth orbiting the sun.
😱😳😲 😲Be still my heart @ 2:46 you said "no one lives at the North Pole"🙄 Um err I hate to be the one to tell you this because you're so smart but..... Santa, Mrs. Claus, all of the reindeer (remember Rudolph & his really bright red nose) & along with all of the helper Elves live at the North Pole. 😁😉👍 Kids watch these videos so you might wanna edit that part out.
Hi David, your videos are amazing, they're helping me a lot for my astronomy class. One thing though, you said that the ecliptic is higher in the sky during winter and lower during summer... did you say that because you were in the south pole? I'm kind of confused.
Okay, so start at the "pole." Imagine that Polaris - the north star - is like the North Pole on Earth. That is 90 degrees, right? So all of the longitude / Right Ascension lines meet at that point. Those are the ones that go from north towards the south. Declination is like latitude, and every 5 or 10 degrees away from the pole you go, they are concentric circles away from it. You just have to imagine it as if you are standing *inside* this globe of stars, instead of looking from outside.
Nope, they're actually not. Think about it if you laid on your back, with N above your head, and S towards your feet. Where would E and W be? Same placement; it just looks confusing because that's looking up at the whole sky at once, and we think of east being to the right of north if we FACE north. But this is showing the whole sky at once, looking straight up. If you faced north in that graphic, E would still be to your right, but you're seeing the sky from a different perspective. Make sense?
Great question; it's because you're thinking in terms of a map, which we humans look at from a "top down / birds-eye" view. But the sky is up. So imagine this instead: If you could take your computer monitor or screen, and hold it up over your head, with north behind you, and south in front of you, the E/W relationship becomes clear, as they are now on the "correct" sides. It's when you look "down" for a sky that is actually up that cause the confusion. Make sense?
Johan Vanwinkel you're welcome. That's an easy one to look at and wonder what the heck is going on until you orient things overhead for the sky, then it makes sense.
Eyes on the Sky No, it's not making sense. If I hold the screen above me, what am I looking at and where is my point of view looking? Is there a good graphic url I can look at?
Paul C Hi Paul - download the latest all sky star chart from skymaps.com, print that out, then face south. Hold the chart in front of you. Then lean your head back, and bring the chart up over your head, so north will be behind you/"up" on the map, and south still towards your front / at the bottom of the map. East and west will then be correct. But if you turn around with the map held below you (like a terrestrial map) and north at the top/south at bottom, looking down at it (not over your head), east/west will appear reversed on the star chart compared to actual directions. That's because the star chart if for overhead, not viewed from a 'birds eye" perspective. Print that chart, try that, then let me know if you still don't understand. :-)
Discovered that one can see the Star Sirius in broad daylight with a pair of binocs. (even at noon in the 1st week in July when it is closest to the sun). There are a few simple tricks required .........
During the day. BUT... the ecliptic at night is opposite. Think about where you are on Earth when it is dark, so the Sun is low during the day in winter, yes, but then the ecliptic is high overhead at NIGHT in the same season. Opposite for summer. Because you're tipped the other direction from day to night.
I am a little bit confused at 1:05. I've tried marking it out on paper then raising it over my head but it didn't make any sense. i thin that N,S,E and W are all inverted but I don't know. could you please explain David, it would be highly appreciated.
Download the current sky map here www.skymaps.com/downloads.html It has E and W inverted too, for good reason. Held over your head, with N and S in the correct orientation, E and W are then correct. They are wrong when looking down at the ground. But that's not a map of the ground (down), it's a map of the sky (up).
Hi all I am new to this hobby , and I don know anything about it at all , still searching around and try to get more info about this hobby , and the first thing is I need to know how to get the polar star , and how do I know how many degree of latitude of where I live in ?I live in miri Sarawak Malaysia , and I did search the map for my living place , but then show there is like this pls teach me how to set it up thank you .Miri is located in Malaysia country, in Southeast Asia continent (or region). DMS latitude longitude coordinates for Miri are: 4°24'53.28"N, 114°0'32.04"E. • Latitude position: Equator ⇐ 491km (305mi) ⇐ Miri ⇒ 9516km (5913mi) ⇒ North pole. • Longitude position: Prime meridian ⇒ 12619km (7841mi) ⇒ Miri. GMT: +8h. This is what I get after I search it .Thanks again
Your latitude is 4 degrees north. Finding the pole star may be difficult as it will only be 4 degrees above the horizon, but you can estimate approximately where it is at by using a compass and this video: ruclips.net/video/plx6XXDgf2E/видео.html
Thanks for disappointing me. I came here expected this to be yet another boring and confusing RUclips video. I was disappointed. This is well presented, you speak very clearly, and the information is useful and coherent. Admittedly, I already knew almost everything you said having been an astronomy buff since the 70's, but it was definitely a wonderful review of the basics. Keep up the great work!
Uhh, I believe the word you’re looking for is, “impressed...” You were saying, “disappointing” as if you were saying the video was bad, not good.
@@peakart8850 uh...nooo.....
Seems you have misunderstood what I wrote. What was I expecting? Did I get what I was expecting? Or did I get something I was not expecting and thus was "disappointed"?
@@jimmo42 Well, you write positive feedback to the kind RUclipsr, but yet you say you are disappointed. I just may not be hearing you right, but if you were expecting a bad video and was surprised to see it was well presented and that the man spoke clearly, then the correct word would be, “impressed.”
And the definition of the word, “disappointed” is that you were expecting more of somebody or something, but did not receive that level of expectation.
@@peakart8850 Google "sarcasm and intelligence". That might explain the problem you have understanding.
Thanks - I figured there are some folks who are interested, but don't know how to get started and may be afraid to ask. This way they can get the basics of the terminology, where and how to look, and then ask better questions. I'm hoping that astronomy clubs may find these useful to put on their websites too, as it should help beginners get basic astronomy questions answered so newcomers will feel better informed.
Thanks dude, I'm trying. Started stargazing as a kind of therepeutic thing with some binoculars. I do struggle to orient myself, sometimes I can easily spot constellations when I'm lying down, then I move around and look up and it takes me ages to get my bearings again. This should help with that. It's really cool though, feels like I'm reconnecting with my ancient ancestors and the universe again, we are all stardust after all. It feels great to learn the constellations, once you can see them properly it's like your painting the night sky with your imagination.
You're welcome! Remember, the zenith is different depending on your latitude (and not the same as the celestial north pole); it is the point directly over your head, no matter where you are on Earth. So nadir is directly down through the ground, wherever you are, and won't point at south pole unless you're at north pole. Altitude is degrees above your own horizon; azimuth is the direction "around" that horizon. Download free program Stellarium; bottom tabs have most of these listed.
This guy: no one lives at the North Pole.
Santa: Am I a joke to you?
Lol exactly. You are a joke
loool goddamit #santarights
That's a good point, where do flat earthers think Santa lives? More evidence they will dodge.
lmao
the war on Christmas!
What a great video! Thank you for posting and keeping it simple! I am 51 years old and received a telescope for Christmas and trying to learn the basics before I attempt to use it!!
After listening to this guy....I'm getting spaced out ~
Yeaaaaaaa
Nice one
Im 15 and my love for astronomy i had as a child is starting to grow again. Ive been looking for information about the planets and the night sky for a week now , have installed an app to help me too. I'll buy a telescope in a few months when im completely ready!
Do you still love it? Cause now I'm 16 and I can relate to you
Excellent video, thank you. A true astronomer! Wearing a comfortable black hoodie while presenting an instructional video to thousands of viewers.
You're welcome! It's better to be laid back, the way I see it. :)
Thank you Jim. What I was thinking was astronomy clubs might want to put them on their websites, to help people get oriented in the night sky, so they feel more educated if/when they show up to outreach events or meetings. But I also use them to supplement my own live presentations at libraries and park districts, because I cover the same concepts each time. This way people can review them at their leisure on my website or on RUclips too.
Excellent! I liked how you explained everything clearly. I'm interested in this subject but I was often fooled by fake, not-so-clear, clickbait videos. Finally found your channel & hopefully watch more videos from your channel. Added to a playlist: Astronomy, cosmos, universe. Thanks again from Great Britain.
(Mon 11 Oct 2021 12h10)
Thanks for this. I'm taking an Astronomy class next semester, and this helped me wrap my head around the concept of the celestial poles. I never knew stars rotated in the sky though, I always assumed they just went from East to West like the Sun. Interesting stuff!
You're welcome. Remember, the stars don't actually rotate; it's Earth rotating that makes the stars appear to rotate over our heads. And they do go from east to west - it's jut the ones closer to the poles go in a circle. Well, they ALL go in a circle, because the Earth rotates! Make sense? :-)
You're welcome, and I'm glad that things "clicked" for you! :-)
Awesome videos...Highly appreciate your efforts in making these...
I'm sort of late to the party, but I just wanted to take a moment to thank you folks at eyes on the sky for all the helpful information!
Nicely explained subject with very good graphics.
So um, I had done an astronomy crash course about 5 years back. Wanted to get back into star gazing.
Thanks for making this video. It is truly amazing
You're welcome - thank you for the kind comment!
Wow thanks for that! I couldn’t put into words what I was thinking to explain to someone what I was trying to understand. And the simple words of “getting oriented with the night sky” sounds so basic but is powerful thanks! 🙏🏽 🎉 🌎
Hi Charles - thanks for the thoughts. I guess I look at this way: In the story of the tortoise and the hare, the tortoise won. Maybe comparing myself to a tortoise isn't the greatest one to make, but the point is this: Over time, the views will go up. That's what matters. I'm not worried. :-)
I love your videos. So well at explaining things precisely and clearly. Thanks :)
Thanks. This explains whole lot for me. As in Contact . Jodie Foster was talking about right ascension and declination :) I had no ide what she was talking about :) Ty
David, David, David! Thank you! Now that was the best explanation and presentation I have seen on this subject. For a little over a year I've been heavily into astronomy, reading a lot and even trying to make sense of this Coursera (Duke U.) Into Astronomy Course, and you really nailed that for me. Thank you!!!
You're welcome John - glad I was able to help!
SO clearly explained! Thank you!
Boom this is exactly what I was looking for, thanks!
Posted eight years ago and still replying to comments, what a chad. My town uses the wrong lights so there's lots of light pollution. Terrible shame because the night sky is so beautiful, still helpful for what I can see. Thanks!
Maybe one day we can get everyone to turn off the lights together, and the world will see the wondrous cosmos that is usually hidden from their view. Ah well, probably not - but I can dream!
Cheers and clear skies.
I just discovered your videos, and I find them truly educational. Thank you for preparing this content to teach to us. I'll keep studying.
Thank you for your kind and generous compliments.
thanks so much! i have my astronomy gcse tomorrow afternoon and i really didn't understand declination and right ascension until i watched this! many thanks from the UK :D
Really enjoyed this video. Informative, straight to the point and with a friendly disposition, and fine graphics to supplement the info given. Grade A quality. Thanks!
Went from my 11PM to the 15PM in natural. Love it. Awesome bit of kit.
Couldn't be explained any clearer. Crisp and clean without assuming anything about the viewer which is a rarity!. Thank you for taking the time to make these. .
That is one of the nicest compliments I have ever received. Thank you so much; I work really hard to explain things clearly without talking down to viewers.
Awesome videos bud. Keep them coming learning something new with each video. Thanks again.
Thanks for educating and getting me really started on star gazing...this is very nice n clear explanation. u deserve full marks. you can load more videos on this topic & astronomy in general
I like that he used stellarium !
David,
I am just getting into astronomy and found your videos. They are truly awesome, thank you for all the obvious hard work you put into them. Watching the sponsor's ads in full in the videos, thanks.
Xsheaffer thank you so much for the kind and generous compliment!
This is great ! I studied physics some years ago but never had a chance to get into Astronomy. Now I'm hiking in the wilderness more and wanted to appreciate the night sky better.
Question: Can I use the position of Polaris, to determine magnetic declination for normal daytime compass use ? Seems like one could do that.
Superb information video Dear ❤️... Thank you for sharing 🙏❤️
Absolutely fantastic video. Exactly what I was looking for
I just got a telescope today and spotted your videos.
You Da Man!
You Da Man!
Will use you every time for instructions and help.
Great video sir, my daughter and I watch this 3 videos 3 times each.
Just watched basics 1 through 3, I've had a Eureka moment, thanks, really enjoyed (and understood) the vids.
I can't find Basic 2 or 3. Please help!
Hello Hello Happy Holidays! Thank you so much, wishing you the same. We hope this season ends on a joyful note and continues into a safe and prosperous New Year for you and your Family.
Thank you Sakura! Happy holidays to you as well.
Iv always loved space since i was a kid, its one of my main interests and i want to learn the constellations and how to star gaze thank you!
fantastic! I teach Astronomy and your videos are great to prep and share.
Thank you so much! I think others who teach astronomy refer to them too, which is both amazing and humbling.
Always refreshing to see videos like these from you.
being familiar with globe ( earth ) including longitude and latitude having basic idea of earth rotation and earth"s path around the sun and moons rotation around the earth I picked up on what you described as CELESTIAL SPHERE and the idea of ZENITH and fundamental movement in sky of stars and planets ( same as sun- E to W ) good basic lesson my next step is to understand declination and ascent later
Nice and simple. Now I can buy an Accurist Celestial watch, and begin by understanding the lines!
Hi David, your videos have been extremely useful in my pursuit of astronomy with my daughter. About 3 years ago I purchased Meade LX-200 10" (Schmidt-Cassegrain) with an AutoStar Upgrade and GPS. Also, I have an Equatorial Mount. My biggest issues (still today) is aligning my telescope. While I can find Polaris I'm never certain if the Stars I'm aligning to are the correct Stars. Hopefully, I've solved this problem is an iPhone App called StarChart. It would be a lot easier if I had a local club, but unfortunately thats not possible.
Andrew Beau set your mounts latitude to your latitude, level the telescope as best you can, and aim generally as close to north as you can eyeball it. That's good enough for visual observing. I have some videos on aligning and aiming equatorial mounts; check my channel. Not ideal for a fork mounted scope, but still might help.
All you explain is korrekt and we use it in this way.
Thxs for your videos, I am a novice and just purchased my 1st telescope and I am clueless , but your videos are of grt help
Great help! I'm going through an old stargazing book and its nice to have a little video to supplement
Glad it was helpful!
👍Your videos are very helpful and easy to understand. Thank you!
LovingAtlanta that's very kind of you to say, thank you!
Hey man thanks for these videos. they are really helping me figure out this RA and declination. I appreciate it.
Enjoyed your explanations on telescopes. I did bump into a little serious Astronomy, after I created DIY Barlow Lens for a Dime, took some moon shots, now I am trying to observe crescent Venus with this...there is a bit of aberration issues. I should be able to resolve it I am sue. Do find my moon shot with my own DIY telescope and J6 plus mobile. Loved your channel, continue inspiring the world..........myself an architect, musician....!!!
Thanks to you i could visualise this scenario, as i am not able to witness the night sky with my own eyes due to the pollution and my myopia 😢
I just had an epiphany! Did you feel it? Excellent series. Until I found you, I would point my scope at something (the moon) and focus. It's a learning process but my goodness, your explanation makes it seem like I am a real astronomer. My friends think I am a half a bubble closer to being the cool buddy. Tonight I got a big surprise for all the mosquitos! Nobody told me about that part in the telescope store... 8-) I got eaten alive last night! A friend said turn on a fan, I hope it works.
The ecliptic has confused me David. You say lower in the summer and higher in the winter. Yet the sun is higher in the summer which follows the ecliptic - I can't work out my error.
Great videos btw - they are of great interest and help
+Paul Stankevitch Common question, and a good one. Take a moment to think about Earth's orientation though. It's tilted 23.4 degrees. So in summer, your tipped towards the Sun in summer on the "day" side of Earth. But think about what you said, "the sun is higher." That's in daytime. On the "night side" you're still tilted towards the Sun; that places the ecliptic lower on the NIGHT side. And for winter, all of that is reversed. Take a globe with a light source and note your location on the globe in day/night scenarios and you'll see how that works.
Oh yes of course (revelation hits me in the face like a frying pan!) - if the summer ecliptic has more of it's length visible in the day time, there's less of it to view at night - hence closer to the horizon! David, you're a great teacher/instructor - I may yet ascend from novice to amateur :)
Fuck off Sion
Sion Cable
Mate, the earth is as round as a ball can be.. How anyone could believe different in the face of a myriad of evidence that proves the fact that the earth is round(amongst other objects and aspects of this universe), is beyond belief!
Sion Cable So you come to an astronomy page, who's owner and his followers not only observe the other round planets, moon and sun in our solar system, but also all use right ascension and declination to track said celestial objects while the earth rotates, supporting the fact (yes, fact) that the earth is round and not stationary. And your plan is to try to convince to us that the earth is flat? Not a great plan bro beans.
'Thankyou" for knowledge and video.
he reminds me of a friendly dad. I trust this man.
Well, that's very kind of you to say.
I suddenly became interested in stars when I saw a very bright star just a few days ago and It kept bothering me that I never knew what that shiny star was...your video helped but I didn't really get everything 😅 but I'm hoping to learn more... thank you for this video
Download the free software Stellarium to your computer. That may help you determine what it is.
@@Eyesonthesky really!!! Thanks alot
Greate work,like it.
Can you please explain how the northstar can be fixed in the same spot? and how come all the star constellations are the same and moving in the same pattern since the beginning of the earth as we know it? Shouldn't we see new stars all the time since we are speeding around in the universe after a moving sun? Or are the star constellations we see moving around the earth? While the earth is moving around it self and at the same time around the sun that is at the same time moving through space? I would really like to get a intellectual answer on this and also on what real scientific proofs we have of this?
Very interesting. I have Star Chart for iPad, and have always knwon a BIT about Right Ascension and Declination, but now I understand it more.
Total lunar eclipse tomorror or later today depending on your time zone. Mars should also be visible near the full moon. The eclipse is less than 24 hours away.
Posted at 23:34PM GMT BST 26th July 2018.
The Eclipse starts Friday 27th July 2018 at about 21:21PM (Please check the real time to be sure). Full moon is at 21:20PM GMT BST.
"... so we can all see what's up."
*Stands up, claps slowly, nods in approval.*
Well, thank you!
*takes small bow*
I gotta apply practice thanks for this David.
Super video❤️👍
oh wow, i can't believe I missed the "night sky part" .. i understand it now. thank you sooooo much!!.. more power to you!!!
No, it's okay. I kind of trailed off a bit when I said it, so it isn't as forcefully stated as it perhaps should be. But it's a good question to ask, and besides, now you know!
This series of videos is awesome, thank you! Starting from here.
Says the guy with a Illuminati pyramid as his pic
Someone said “he lost me a pizza.” And that’s hilarious to me I don’t know why 😂
GREAT 👍
Great Video
Loving the content
This is a great video.. Thanks
Great work duder, this is really helpful.
Thank you!
Excellent video, learning this stuff just for fun and taught a lot.
These are 3 totally different coordinate systems that are used together to track the movement. One system is oriented to the viewer, one is oriented to the planet and the other is oriented to the zodiac - or the ecliptic plane. It's too complicated to think of them as one system.
Here's a 'nuther way to say it:
Say, you're in a car driving around the block to go to the 7-11. You always go the same way. You pull out of your drive way and turn right (in 'Merka, or left in the U.K.). One system of orienting yourself is to look at what you are passing as you drive by. You see your neighbor's house, the house with the big scary dog, the house on the corner, the real estate office, etc. You pull into the parking lot at the store, buy some gum, then get back in the car and pull out again, turning right and drive the rest of the way around the block, passing the tattoo parlor, the crazy cat lady's house, your other next-door neighbor's house, and then pull back into your own drive way. The coordinates of the stationary or "fixed" things never change - but some people, animals, vehicles, etc. move on their own, so their locations will change.
Another system of orienting yourself could be a grid system painted on your car windows, oriented to the car. So, there is a vertical line down the center of the front windshield, one vertical down the center of the back windshield, two in between the front and back side windows - maybe on the door frame - and a fixed number of lines between all 4 of those lines primary lines. Then there are horizontal lines going all the way around from the bottom edges of the front windshield, the right side windows, back windshield and left side windows; and several more horizontal lines at fixed intervals above that bottom one with the last one at the top - each all the way around. All this makes a grid pattern that is a bit warped due to the shapes and slants of the windows, and each passenger in the car will have different coordinates on this grid to locate what they see.
Another system of orienting yourself is a similar grid pattern painted on a pair of goggles on your face. This system is oriented to your individual field of view. Even if everyone else in the car were to be wearing the exact same pair of goggles, they won't see what you see. No one will. And as you turn your head around, or sit in a different seat in the car, this will change the coordinates of what you see.
Against these grids, you can locate stop signs, people walking and cars passing on the other side of the road, etc. as they move or don't move - *but they all move relative to you as you move.* Each of these systems has their own language and symbols and number system.
Now, use all 3 at the same time.
That is what is going on here.
It's crazy awesome!!!
🤓👀😵🧠😁🌌🌞
You are very welcome - thank you for watching.
Yeah cool video. I just got a free dinky little telescope and finally live in an area without light pollution. No idea what I'm doing so this is great!
Great video, thanks! Noticed that E and W are swapped in your visual that explains the zenith, ecliptic etc.?
Oh, thanks God! Finally something easily understandable!
I am glad you think so!
At 1:35 there's a bit of a implied inaccuracy. The sun traces a line in our sky because of the rotation of the earth, not because of the the earth orbiting the sun.
Good idea to outline the basics for beginners.
Awesome video man
Hi sir any different in latitude when we measure it on sea and same on earth from north star
😱😳😲 😲Be still my heart @ 2:46 you said "no one lives at the North Pole"🙄 Um err I hate to be the one to tell you this because you're so smart but..... Santa, Mrs. Claus, all of the reindeer (remember Rudolph & his really bright red nose) & along with all of the helper Elves live at the North Pole. 😁😉👍 Kids watch these videos so you might wanna edit that part out.
XLNT point, LA!
LovingAtlanta santa claus is a mushroom
David. Give a nod to us urban astronomers. We never look up.
Hi David, your videos are amazing, they're helping me a lot for my astronomy class. One thing though, you said that the ecliptic is higher in the sky during winter and lower during summer... did you say that because you were in the south pole? I'm kind of confused.
Great video
Thank you
Okay, so start at the "pole." Imagine that Polaris - the north star - is like the North Pole on Earth. That is 90 degrees, right? So all of the longitude / Right Ascension lines meet at that point. Those are the ones that go from north towards the south. Declination is like latitude, and every 5 or 10 degrees away from the pole you go, they are concentric circles away from it. You just have to imagine it as if you are standing *inside* this globe of stars, instead of looking from outside.
Nope, they're actually not. Think about it if you laid on your back, with N above your head, and S towards your feet. Where would E and W be? Same placement; it just looks confusing because that's looking up at the whole sky at once, and we think of east being to the right of north if we FACE north. But this is showing the whole sky at once, looking straight up. If you faced north in that graphic, E would still be to your right, but you're seeing the sky from a different perspective. Make sense?
Great! This is amazing! Thanks so much!
Watching from Bangladesh 🥰
Amazingly helpful. Thank you!
in what age this statement become created?
Ok. how come east is now on the left and west on the right? Day time looking North, East on my right and West on my left. WTF????
Great question; it's because you're thinking in terms of a map, which we humans look at from a "top down / birds-eye" view. But the sky is up. So imagine this instead: If you could take your computer monitor or screen, and hold it up over your head, with north behind you, and south in front of you, the E/W relationship becomes clear, as they are now on the "correct" sides. It's when you look "down" for a sky that is actually up that cause the confusion. Make sense?
thank you, now i know
Johan Vanwinkel you're welcome. That's an easy one to look at and wonder what the heck is going on until you orient things overhead for the sky, then it makes sense.
Eyes on the Sky No, it's not making sense. If I hold the screen above me, what am I looking at and where is my point of view looking? Is there a good graphic url I can look at?
Paul C Hi Paul - download the latest all sky star chart from skymaps.com, print that out, then face south. Hold the chart in front of you. Then lean your head back, and bring the chart up over your head, so north will be behind you/"up" on the map, and south still towards your front / at the bottom of the map. East and west will then be correct. But if you turn around with the map held below you (like a terrestrial map) and north at the top/south at bottom, looking down at it (not over your head), east/west will appear reversed on the star chart compared to actual directions. That's because the star chart if for overhead, not viewed from a 'birds eye" perspective. Print that chart, try that, then let me know if you still don't understand. :-)
Discovered that one can see the Star Sirius in broad daylight with a pair of binocs. (even at noon in the 1st week in July when it is closest to the sun). There are a few simple tricks required .........
Wouldn't the sun be lower in the sky during the winter and higher in the summer? I think it was said the other way around in the video.
During the day. BUT... the ecliptic at night is opposite. Think about where you are on Earth when it is dark, so the Sun is low during the day in winter, yes, but then the ecliptic is high overhead at NIGHT in the same season. Opposite for summer. Because you're tipped the other direction from day to night.
I am a little bit confused at 1:05. I've tried marking it out on paper then raising it over my head but it didn't make any sense. i thin that N,S,E and W are all inverted but I don't know. could you please explain David, it would be highly appreciated.
Download the current sky map here
www.skymaps.com/downloads.html
It has E and W inverted too, for good reason. Held over your head, with N and S in the correct orientation, E and W are then correct. They are wrong when looking down at the ground. But that's not a map of the ground (down), it's a map of the sky (up).
Thank you very much David. Highly appreciated. Also, your videos are outstandingly good, keep it up!
Hi all I am new to this hobby , and I don know anything about it at all , still searching around and try to get more info about this hobby , and the first thing is I need to know how to get the polar star , and how do I know how many degree of latitude of where I live in ?I live in miri Sarawak Malaysia , and I did search the map for my living place , but then show there is like this pls teach me how to set it up thank you .Miri is located in Malaysia country, in Southeast Asia continent (or region). DMS latitude longitude coordinates for Miri are: 4°24'53.28"N, 114°0'32.04"E.
• Latitude position: Equator ⇐ 491km (305mi) ⇐ Miri ⇒ 9516km (5913mi) ⇒ North pole.
• Longitude position: Prime meridian ⇒ 12619km (7841mi) ⇒ Miri. GMT: +8h. This is what I get after I search it .Thanks again
Sorry I am too noob for this :(
Your latitude is 4 degrees north. Finding the pole star may be difficult as it will only be 4 degrees above the horizon, but you can estimate approximately where it is at by using a compass and this video: ruclips.net/video/plx6XXDgf2E/видео.html
Thank you very much