Astronomy - Ch. 28: The Milky Way (4 of 27) Orientation of the Ecliptic Plane
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- Опубликовано: 25 авг 2024
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We will learn about the ecliptic plane of our solar system in relationship with our Milky Way Galaxy respect to theta=angle between galactic disk and the ecliptic plane, and the angle between galactic disk and equatorial plane.
Next video in this series can be seen at:
• Astronomy - Ch. 28: Th...
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Excellent explanation!
Thank you, this is exactly what I was looking for.
Fascinating
Fascinating! Have not seen this explained before. Thank you
I was trying to get this information about angle between Galaxy and Earth's equator from ChatGPT for an hour with no success.
It revealed there is angle of 60 degrees between the ecliptic plane of the Solar system and the Milky Ways galactic plane, but insisted the other information is not measured (an obvious nonsense) and it is changing between 60 -/+ 23.4 degrees (that is the angle between Earth's equator and the ecliptic plane of the Solar system).
One minute of using Google search and here we are! :)
Kudos to Michel - great ability to explain the thing!
Thank you. Glad you found our videos. 🙂
Great presentation! You answered my question. Thank you!
Our pleasure!
You lectures are well prepared and rehearsed. Better than most, without a doubt. I miss the dark skies I knew when I was growing up. Ganymeade was a naked eye object for a ten year old under dark skies many years ago.
I like thinking about all the exosolar systems out there, all at different angles.
Most of the stars in our galaxy probably have planets circling them.
Thank you, amazing explanation
Glad you liked our video 🙂
Isn't it amazing how gravity and orbits work.. our solar system is traveling around the milky way and yet we are not left behind... We have the same trajectory as our sun does but also with a vector taking us around the sun. If we used star lifting to change the vector of the sun, Earth and all that orbit the sun would change in the same direction. That blows my mind.
Because we are caught in the gravitational field of the Sun
I care. Cuz it's Sept 1, 2022 and I'm in Rushing River, Ontario, and I think I see the galactic plane directly overhead between around 11pm to 2am. So I kind of guessed with my hand the rough angle the solar system must be to the Galactic plane and I think 60deg matches my intuition. Cool!
Yes, that is how we get the persepective of how we are oriented relative to the galacic disk.
Does it matter omg lady...heck ya...fascinating stuff! Thank you
Glad you enjoyed it. 🙂
In your image you have the equatorial plan inside the ecliptic plane, but the equatorial plane is a larger angle and should be outside.
The normal to the planes point in differet directions. (They are not purely additive).
Got it. I was thinking the image was a view toward the center of the galaxy, but I think you chose a different angle (possibly to get a better sense of the various planes so they did not just appear as thin lines).
It is very difficult to draw on a white board indeed.
Good lectures 👍
Glad you like them!
ABSOLUTELY in my interest to know.
Thank you very much for your input to this understanding and perspective..
Visualizing the surrounding stars has fascinated me and much reading and virtualization has yeilded firm (ish) realizations. So to speak.
Glad you found our videos and are enjoying them.
Thank you! Now I have a greater understanding!
Glad you found our videos! 🙂
It's important for us to know this, do to the fact that Google maps doesn't work when we are traveling from solor system to solar system in the Near Future...
I don't think we'll be traveling to another solare system in the foreseeable future. 🙂
Excellent, thank you for the great explanation!
Glad you enjoyed it!
Does the solar system not precess thru the galactic plane as well? Where are we now? Moving into the plane? Headed down or south or up north? How long is a full cycle
Our Sun does indeed revolve around the center of the Milky Way. It takes about 250 million years for a single orbit.
If the current galactic and ecliptic planes are at 60.2 degrees and the current galactic and equatorial planes are at 62.9 degrees does it mean that mathematically it follows that the current (not the 26 thousand years wobble) difference between the equatorial and ecliptic plane is 2.7 degrees?
I understood that really quick lol 🙂
if the Angle of the ecliptic to the galactic plane is 60.2 on the "x" axis; what is the angle on the "y" axis?
The angle between two planes is typically expressed in terms of an angle beween 0 and 90 degrees. We don't reference it to the x or y axis.
Where is 62.9° from? The current tilt of equatorial plane away from the ecliptic plane is 23.5° towards the galactic plane. so 60.2°-23.5°=36.7° should be the angle between equatorial and galactic planes, isn't it?
The 23.5 degree tilt is between the equatorial plane and the ecliptic. This has no reference to the tile of the galactic plane.
@@MichelvanBiezenNot really. Look at your graph at the upper right corner. Between the black and yellow planes is 60.2, and 23.5 between black and blue. So it's 36.7 betweenà blue and yellow.
What is the tilt of the Earth toward or away from the center of the galaxy? If the Earth’s galactic tilt is 2.7 degrees difference from the Sun’s galactic tilt but the Earth has a 23.5 degree difference in tilt with the Sun, that means most of the Earth’s 23.5 degree tilt with the Sun is attributable to a tilt towards or away from the galactic center. It would be awesome to understand if that tilt is toward the galaxy or away by how many degrees.
The angles are not additive, because the tilt of the Earth is not relative to the galactic plane, but relative to the ecliptic. (so they cannot be added)
@@MichelvanBiezen Thanks for your response. I don’t mean to try to add them. What I mean is to ask: what is the angle of the equatorial plane toward or away from the galactic plane? (Imagine the galactic plane is a circular table and you have have bent down and are looking at edge of the table/galactic plane. The equatorial plane could be a quarter that is held in a position on the table that is mostly seen edge on from the same edge on view of the galaxy. The head side of that quarter will have some angle of tilt toward or away from the galaxy center. I’d like to know whether that tilt is toward or away and what the angle is.)
The angle between the galactic plane and the ecliptic plane is currently estimatd to be 60.2 degrees.
i LOVE ON STAR TREK HOW THEY EXPLAIN HOW TO SET A COURSE IN SPACE. BY 2 360D CIRCLES. OR BY HAVING 7 POINTS IN SPACE TO PLOT A COURSE
I love your lectures, thanks. I am wondering if the ecliptic plane processes wrt the galactic plane like the earth processes wrt the ecliptic?
Since the solar system is not a solid body, but made up of many parts that move independently, there is no precession of the ecliptic plane.
@@MichelvanBiezen But the Sun has got an axial tilt of a few degrees so has it an axial precession independent from the solar system?
Would it help, for visualization purposes, to first align all the planes?
In other words, rotate the elliptic plane into the equatorial plane, then into the galactic plane.
Then for visualization, rotate the ecliptic to the proper angle relative to the galactic, then rotate the equatorial relative to the ecliptic?
I find it very interesting.
Where am I in direction up or down on my universe befor i work out the tilt math for this little gem??? Have you got the Ozone hole yet personal i think it has always been there for climate like the 12 years the h2o blow away then as soon as it moves the south gose off and even linked to the north as it had a more intense upset, It's a one for Saturn/Jupiter cyclone hole??or something more Darwin???.
I guess if our ecliptic plane matched the galactic, and we did not have precession, the night skies would reflect many fewer stars in our view out into the Milky Way?
I can see where this is important for large scale maps.
The orbital speed of the earth can be gauged against the sun and distant sources, such as quasars, at about 30 km/s. Meanwhile, the sun is moving in galaxy at some seven times that speed. The planets then can be thought of as moving in sort-of spirals about the sun.
I just mean that, on a galactic scale, Earth basically has two motions: revolution about the sun in the elciptic, and keeping up with the sun in galactic-disk-wise travel.
So, the earth, while measured moving [roughly] equatorially at 30 km/h, also moves [roughly] polarly at 230 km/s or so. This latter is not noticeable against those distant sources, as they do not appear to move. It's like looking at the moon while riding in a car.
Anyway, one thing I am trying to get at by all of this is to ask:
Could the slight egg shape of the earth be caused by its galactic motion? It doesn't seem explainable in a simpler solar model. That can explain the oblateness, yes, but not all aspects of the shape of the earth.
At any rate, your video is interesting. I am trying to get a larger view of the earth's motion and your video has helped.
Thank you for the lecture. Ive been trying to figure this out in my brain for ages. But I still cant figure out if the galaxy rotates clockwise or counterclockwise in that diagram. Based on the painting, it appears to be clockwise but ive seen some people show it counterclockwise. I imagine theres gotta be a sign convention here.
The rotational direction of a galaxy depends on which way you look at it. Looking from the top down the galaxy will rotate in one direction and looking at the same galaxy from the bottom up, it will appear to rotate in the opposite direction. The Milky Way rotates such that the arms trail the rotational motion of the disk.
There are astronomical coordinate systems that will allow an observer on earth to identify the position or location of a celestial object (planet, star, galaxy, etc.). Generally the conventions are that north is "up" on earth (meaning earth is rotating counterclockwise relative to the N-S axis of rotation). With earth as the starting point, the sun is rotating counterclockwise and its planets are revolving counterclockwise around the sun. But, keeping with this convention, the Milky Way galaxy is rotating CLOCKWISE, and the solar system is revolving clockwise around its center. See: en.wikipedia.org/wiki/Astronomical_coordinate_systems
@@excellinkus Are you saying the Sun and the solar system have retrograde rotation within the Milky Way galaxy?
I have heard otherwise.
Looking at Milky Way from north, it would rotate counterclockwise just like our solar system (just titled by the 60 degrees), Earth itself or Moon orbiting it...
Is not that so?
Interesting... direction of galaxy angular momentum is different than solar system one - where angular momentum of solar system comes from then? The cloud of dust planets originate from had to spin completely other direction galaxy did. Why was that?
What causes earth axis to precess
Every rotating object appears to precess. Try it with a coin rotating on its edge.
its interesting how the ecliptic plane is at such an angle, or just random ?
It is random.
@@MichelvanBiezen Is it? Perhaps the tilt of the ecliptic is also in a sort of Goldilocks zone. For if it were, say, close to parallel to the galactic disk, it seems like the eccentricity of the orbits of the planets might be greater. Or at least planetary motion would be somewhat different.
@@comic4relief That's in interesting question. If we would orbit the Sun in the galactic plane or speed relative the center would vary from about 190-250 km/s. But the effects would only matter to an observer outside looking in, wouldn't it?
@@rhoddryice5412 I'm not sure how you mean. The climate would be vastly different, for one thing.
is there a website shows the location of the sun in the galaxy?
The Sun is on one of the spiral arms of the galaxy, about 28,000 light years from the center of the galaxy.
@@MichelvanBiezenthen it's kinda hard to guess the location I presume
@@fatthar4804 GAIA is mapping the galaxy with astonishing precision and will create a 3D map of our galaxy. It has got plenty of fuel left so it will operate until 2024. The map will improve over time.
@@fatthar4804 Just checked on ESA website and the 3rd data release was scheduled for the 3rd quarter this year, but is delayed due to a certain virus.
So which way is the earth moving in the ecliptic relative to how the sun is moving in the galactic disk? Could we use the left-hand rule?