Celestial Navigation: The Celestial Sphere
HTML-код
- Опубликовано: 9 июн 2024
- ✔ Casual Animation is made by sailors with a love of animation.
✔ If you would like to use any of our animated content in your own projects, we would love to hear from you. Contact details in the “About” page.
---------ABOUT THE VIDEO---------
The Celestial Sphere is an imaginary sphere that navigators use to help locate celestial bodies. Understanding how the Celestial Sphere works, and all the labels that are used is an essential step in learning Celestial Navigation.
Timestamps:
00:18 Latitude & Longitude
02:12 Celestial Sphere
02:46 Declination
05:04 Right Ascension
05:22 Sidereal Hour Angles
06:30 Zenith
07:36 Azimuth
07:54 Altitude
---------WITH THANKS TO---------
★ NASA
NASA/Goddard Space Flight Center Scientific Visualization Studio.
★ STELLARIUM
stellarium.org/
---------DISCLAIMER---------
Although we take all reasonable care to ensure the accuracy and reliability of the information provided in the content on this channel, the content is provided “as is”. We do not make any warranties about the accuracy, content, completeness, legality or reliability of the information contained within this channel.
The information contained within our videos is not professional or legal advice and should not be considered as such. If you need professional or legal advice, you should consult a suitably qualified professional.
Any action you take as a result of watching this video is strictly at your own risk. 
Развлечения
Your graphics are amazing and your speaking is flawless. Both are remarkable!
I have never been on a vessel in the ocean which I think is why I find your channel so fascinating. It’s like a little glimpse into world I knew nothing about. :-)
To be honest, I became a sailor so I can get to see the Milky Way at sea.
Clear words, clear pictures. Great introduction to this topic.
Good one.
Very interesting and educational .
Thanks man! I was waiting for this :)
Very helpful. Thanks sir
Great video as always
Thank you.
Amazing
I had no idea you had another channel. I subscribed immediately.
Well-Done
The best
gold !
Hell yeah!!!
thank you for the video it helped clarify some things i had trouble with
North of the equator latitude is a positive number from 0 to 90, south of the equator latitude is a negative number from 0 to -90. Longitude is positive east of the Prime Meridian in London, and negative west of London, until 180 degrees from London where -180 and +180 meet.
These describe the same position:
N 30 W 80 is the same as 30,-80
S 30 E 80 is the same as -30,80
You can enter in the numeric string into the location field of your map app and it will move to that GPS position. The opposite side of the Earth from any position is the same latitude with the opposite polarity and the latitude is 180 degrees different from the original location. The points are known as antipodes of each other.
The position 45,90 or N 45 E 90 has an antipode of -45,-90 or S 45 W 90
The longitude of the antipodes will always be 180 degrees different from the original point but with opposite polarity, but from 0 or 180 degrees the polarity of the antipode is irrelevant.
We need more videos sir!!
Most important of all is what reference system you are working with, at the moment and your requirement.
Why you're shifting videos from that channel to this?
can you explain the numbers on lat and long yes i get 51n 47 w
Its how and what the other fingers are , you have said minutes can you explain this in simple terms as you have a good way to explain things
59patrickw Just as circles are divided into 360 degrees, degrees are further sub-divided into a total of 60 minutes. Since a degree at the equator constitutes 60 nautical miles, a minute of arc = 1 nautical mile. A nautical mile is just a little longer than your usual mile by 15%.
I've taken the liberty of creating a playlist for this series: ruclips.net/p/PLetA5Fi4kpULSexPc4Xul4Uq-8HoqifOd
what about the 60 thousand + mph orbit.....?? does that not change where the stars are...?
It does... in hundreds of years.
These cows are small.
Those cows are far away
Prove Earth spins
not necessary, do your own research flattie...
Thanks bob
@@iveneverseensuchbehaviorin5367 Thanks Bob.
you need a flat plane. welcome to flat earth.
You didnt watch the video, poor confused flerfy.
atleast youre smart enough to know you cant defend yourself.
So celestial navigation can't work at sea because waves aren't flat!
Globe confirmed 💯🌎
Research flat earth.
There is no such thing.
#Star Trail: Evidence the Earth is a Sphere
In the northern hemisphere, if we look at the sky to the north, we can observe stars rotate counter-clockwise around a point. This axis of rotation is not visible from observers in the southern hemisphere.
On the other hand, in the southern hemisphere, if we look at the sky to the south, we can observe stars rotate in the opposite direction. Conversely, this axis of rotation is not visible from observers in the northern hemisphere.
This motion of the stars cannot possibly happen in a flat-Earth.
#Stars in the Southern Sky Prove Earth is a Rotating Sphere
If we look toward the south at night in any location in the southern hemisphere, we will see the same set of stars. We will see the stars rotating around the south celestial pole, in the Octans constellation, near the star Sigma Octantis.
The flat-Earth model cannot explain the phenomenon. Looking at the so-called ‘flat-Earth map,’ we should see another set of stars on a different location in the southern hemisphere. The reason is that the flat-Earth model is a false representation of the Earth.
As an example, we will use five cities: Sydney (Australia), Papeete (Tahiti, French Polynesia), Santiago (Chile), Johannesburg (South Africa), and Jakarta (Indonesia).
If the Earth is flat, then observers on the different cities will face opposite each other, and therefore everyone should see different stars. However, in reality, they will see the same stars, only with different orientations. This observation is only consistent with the spherical Earth model and cannot be explained with the flat Earth model.
The flat Earth model was initially designed for the northern markets without much regard for what is happening in the southern hemisphere. Back then, it is difficult for those living north of the Equator to observe the southern stars, and it was not easy for most of them to confirm that the flat Earth model is nonsense. However, we live in modern times and do not have such an excuse, especially for those already living in the southern hemisphere.
en.wikipedia.org/wiki/Celestial_pole
en.wikipedia.org/wiki/Category:Southern_constellations
#Polaris Altitude from Multiple Locations on Earth
The angle (or altitude) to Polaris approximately corresponds to the latitude of the observer. This fact is observed on every location on Earth where Polaris is visible.
By tracing the path to Polaris from multiple locations on the flat Earth model, the lines will not point to a consistent position of Polaris. The reason is that the Earth is a sphere and the flat Earth model does not represent reality.
The position of Polaris today is conveniently very close to the north celestial pole. And therefore, the altitude or the angle between horizon and Polaris can be used to determine the approximate observer’s latitude.
South of the equator, Polaris is not visible and obviously cannot be used for navigation. Polaris is below the horizon and obstructed by the Earth. It is necessary to locate the south celestial pole in the sky to determine the observer’s latitude. It is more difficult as there is no bright star nearby, unlike Polaris in the north.
Polaris itself is not always the north star. Due to the Earth’s axial precession, the position of the north celestial pole will shift. Twenty centuries ago, the north celestial pole was closer to Kochab than Polaris.
All the observed facts are only possible if the Earth is a sphere, and impossible to happen if the Earth were flat.
en.wikipedia.org/wiki/Celestial_navigation
#Celestial sphere
In astronomy and navigation, the celestial sphere is an abstract sphere that has an arbitrarily large radius and is concentric to Earth. All objects in the sky can be conceived as being projected upon the inner surface of the celestial sphere, which may be centered on Earth or the observer. If centered on the observer, half of the sphere would resemble a hemispherical screen over the observing location.
The celestial sphere is a conceptual tool used in spherical astronomy to specify the position of an object in the sky without consideration of its linear distance from the observer. The celestial equator divides the celestial sphere into northern and southern hemispheres.
#Celestial poles
The north and south celestial poles are the two points in the sky where Earth's axis of rotation, indefinitely extended, intersects the celestial sphere. The north and south celestial poles appear permanently directly overhead to observers at Earth's North Pole and South Pole, respectively.
ruclips.net/video/39NwiYdAkSs/видео.html
ruclips.net/video/8w3n-s9i7WQ/видео.html
ruclips.net/video/BGD3lhDCgpY/видео.html
ruclips.net/video/4zRh-1lymOw/видео.html
ruclips.net/video/UNiNJC3UHIo/видео.html
ruclips.net/video/dpaDKH9LOsc/видео.html
ruclips.net/video/6EBnwseiFs4/видео.html
#Midnight Sun in Both Polar Regions Proves Spherical Earth
Midnight Sun is a phenomenon where the Sun remains visible at midnight. This phenomenon occurs in the summer months north of Arctic Circle, and south of the Antarctic Circle.
The apparent motion of the Sun in both polar regions is different. In the north polar region, the Sun moves from left to right. On the other hand, in Antarctica, the Sun moves from right to left. There is no explanation other than that Earth is a sphere.
The flat-Earth model can explain the occurrence of the northern midnight sun. But it fails to explain that the identical phenomenon also occurs in the southern polar region, but moves to the opposite direction.
vimeo.com/327436457
I did, found out all the flerfs are using the globe map to drive around. You research it. LOL
@@tjjones621 the globe map was created using the flat earth map from the 1800's.
@@jamezbond78 no, it wasn't. there is no flatearth map from the 1800's silly.
far too complicated explanation of a very simple concept. typical of today's education system
What is complicated?
That's a lie. Your brain is just pizza roll