The Moon's Orbit and Eclipses
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- Опубліковано 24 лют 2018
- A look at the nature of the Moon's orbit around Earth, and how that results in the libration of the Moon and the occasional solar and lunar eclipse.
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Watch next: Solar Orbiter Discovers Surprising new Phenomenon in the Sun
• Solar Orbiter Discover...
~-~~-~~~-~~-~ - Наука та технологія
Been searching for an explanation like this for so long... Finally, video which is worth..
Thanks!
Thanks for this video. It was exactly the level of complexity I was looking for.
The animation of how the moon's orbit is tilted by 5.2 degrees and how that looks during the different seizons is very well done, very clear.
Clearly the best explanation of lunar orbital dynamics that I've seen on YT... thanks mate, love your channel (from Australia)
Glad you enjoyed it! Cheers from the other side of the planet!
@@LaunchPadAstronomy @7:47 your art work depicts the moon casting its shadow something like this O>. that is very funny. the only shadows I have ever observed cast more like this •< . Why don't you, rather than explain this, give a real world demonstration of an object casting a shadow smaller than the object itself? Good Luck in advance.
@@In_Remsince there only one source of light, shadows like this 0< are not possible. 0< kind of shadows occur due to multiple light sources from different angles.
So what you would expect is a straight line of shadow right on Earth. But light is also a wave which causes dispersion on the edges of the shadow which illuminates them and so shadows are classified as umbra and penumbra.
Due to large distance between Earth and Moon, the umbra becomes very small and sometimes (as explained in the video) antumbra also forms.
The shadow is a straight line but the penumbra region takes more space as distance increases. So you get a shadow like this
0>
@@javedansari-nb2pk gibberish is not a real world demonstration. go try to sell that elsewhere
The video is gold 🥇 It has everything that I have been wanting to know about the moon's orbit. Thank you very much for making this video ❤️
Glad you enjoyed it!
Thats the video I was looking for. Everything perfectly explained about Lunar orbit with great animations.
Thanks a million. I thoroughly enjoyed your content and narration. To my mind, your video is second to none that I have seen. Truly educational and well explained in a logical sequence of sub-topics on the inherent nature of the moon itself and its relationship to the earth and the sun that manifest itself as our perception of an exciting, mysterious and a marvellous satellite that our moon is in our life. Wonderful!
Thank you so much for making this video. It finally helped me understand the lunar orbital precession visually and I had been looking for a while. Great work
Wow, you have answered a few key questions I have been asking the web for a while now. This video made it all so clear - a million thanks!!!
Glad it was helpful!
Wow..things got cleared. Thankyou..
Great video, thoroughly enjoyed watching, this is exactly what I was looking for! Great job.
Great way to illustrate it. Made a perfectly clear image in my mind.
Great educational value. Finally at 65yo age I get it and understand it. Now I will unfortunately forget it, probably. But I know where to renew the knowledge
justt wow! amazing work, thanks for sharing
Thank you for another amazing video! Another puzzle completed
Great explanation!
Outstanding! Thank you so much!
Perfect explanation I was looking for.
I was looking for this info. Finally 👍🏻
gorgeous video and fantastic explanation, thank you!!
I'm glad you liked it!
This is an amazing video! Thank you for sharing!
My pleasure, and thanks!
Amazing explanation. Thanks.
Thank you thank you thank you this is exactly what I was looking for
This is the most details and easy to understand about moon's orbit. Thanks!
Thank you so much!
Amazing. Thank you for sharing this video!
My pleasure!
Everything I wanted to know. Thanks!
This is the best video I could ever find regarding Moon!
Very useful! Thank you so much!
Thank you very much, I've always sought an explanation as to why eclipses do not occur every lunar month.
This explanation is clear, concise and well supported with graphics.
Seeing how orbits intersect is perfect. Tnx
Such complexity explained so simply. Salute to you. Animations are great, voice and speed of explanation is perfect. Looking forward to more videos from you. 👍👍👍 may you make video about precision of orbital plane of moon and sidereal and synodic month? And also about Equinox??
Clear and smart. Thank you!
Your Friendly Neighborhood Astronomer, at your service.
This is so good and exactly what I was hoping to find on youtube.. thank you! :D
amazing. nicely explained
Thanks!
It's very informative
with a really good presentation
_Thank_ _you_
Thanks!
Thank you very much sir,I feel very relaxed to see the video.Something got cleared.Once again thank you for sharing such kind of video.
I'm glad you enjoyed it. Cheers1
Great job. Thanks
My pleasure. Thanks!
Wow, what a lesson. Amazing teacher ☺️
Thank you! 😃
Very well explained with clear animations. I am learning at my age 83 from your top class video. Thank you for your making this video. I wonder how complex celestial mechanics is with so many variables. Your explanation for the red moon during total lunar eclipse is impressive. Thank you from India.
Very clear explanation on why eclipses don't occur every month! Thank you!
Fantastic!
What a wonderful lovely video, thank you! The peculiarities of the moon's orbit and particularly its inclination have left me wondering many times. I'm so happy to find a comprehensive explanation. I'd love to see more around the time-lapse sequence showing how the appearance of the moon changes over the course of an appropriate length of time, and I wonder if there is actually a repeating cycle which could be observed - it sounds like there are several cycles which are necessarily synchronised at all. Thanks again.
Best visual representation. Fascinated by the moon
This is an excellent vid!!!!! Thx for sharing it
Glad you enjoyed it!
@@LaunchPadAstronomy I did. I’m actually watching another one by you guys... :o)
the best video!
Hey it's a wonderful video. Can you make a video on the relation on apogee perigee, full moon new moon and tides in ocean? Thanks
Great Job!
Thanks!
I almost never saw a video with that simplicity and clarity explaining why eclipses doesn't happen each month... Masterclass.
Thank you for this great explanation! So hard to find a visual like this. The only thing more I cannot visualize is why the solar eclipse shadow moves west to east when the earth's rotation is so much faster than the lunar prograde orbit around the earth.
Fantastic 👍👍👍🙏🙏🙏🙏🥰🥰🥰
This is a wonderful video! It's very difficult for me to be able to explain why we get eclipses with the moon's orbit at a tilt. This will really help my students!
That's great Leslie! And thank you for your service.
Kudos
Great explanation of why a solar eclipse isn't seen on the entire "day side" of the earth, just a narrow strip. Thank you.
oh my god thank you. Sometimes I just have to see the diagrams cuz it's hard to visualise the orbits of both moon and earth etc.
That earth, devoid technology gave us TECH & looking back is amazing wuts 2 come is mind-blowing!
If I understand well the lunar standstills are caused by the precession, when the orbit tilts in the same direction as the tilt of the earth rotation axes, they re-inforce and the moon goes higher or lower during one rotation around earth... and when the orbit tilts in the opposite direction this is lower... and exactly in between the path of the moon in the sky matches the path of the sun...
What an extraordinary explanation. Sir, you are the best teacher I ever had. It just cant get any better. This video is 2 things that don't usually coexist: technicality and beauty. May I ask what do you use for making these extraordinary animations
Agreed. I learned much from this video.
Thank you very much for the kind words. This is the slide deck I use to teach the subject in class it’s all done in Apple Keynote.
8:29 imagine the Moon being a lens and that red line being a Sunlight focus. Sizzle sizzle. Life would be much more exciting as Moon's path is so messed up.
Christian is like the “Richard Feynman” of astronomy and astrophysics but in the era of awesome computer graphics! Thanks again!
Wow, thanks!
@20083500HD
can a total eclipse path take the same exact path and location again thousands, millions or billions of years later for example the total eclipse on 4-8-2024 can another total eclipse take that same path and location again if not why?
10:21 Photographer missed to erase that thing on the ”moon” that casts a shadow on the ”sunbeams” How do you create shadows on sunlight?
With a sheet and some studio lamps? Pictures is from Wikipedia commons.
Did u mention,towards the end, the movement of the center of moons "orbit" as "counter clockwise"... Both in the image and in the animation it moved clockwise... And also clockwise tallies with the astrological calculation because the nodes move clockwise, where as rest of the planets go anticlockwise
This might seem rudimentary, but I've just learnt the effects of Axial precision on on the equinoxes and solstices - for some reason I thought that they were effected by earth's elliptical orbit and that the solstices coincided with its orbital apsis!
Your animation of the precession cleared a lot of my thoughts.
I am curious what is the reference point for the apogee and perigee - I mean what happens with the elliptical orbit of the moon around the earth, watching the solar system from above - what does it stay aligned with?
I'm glad it helped. Apogee and perigee are relative to the Moon's major axis, which in turn is independent of the line of nodes. It's otherwise independent of phase, which is why we can't get eclipses unless the line of nodes is pointed toward the sun and when the Moon is at new & full phases.
Is the moon's orbit from the moon-sun frame sinusoidal or epicyclic?
17:00 I believe the Nodal precession is clockwise seen from above according to the simulation. And also the alignment is about 10 days earlier, NOT later. The narrative contradicts what the video is trying to explain and ends unexpectedly, don't know why?
Yeah, I messed up my narration on this. The orbit is precessing *"clockwise"* and the eclipse arrives ~10 days *earlier* than it otherwise would have. Got the animation right but botched the narration :(
Conceptually this makes sense but in reality I have no idea how we were able to figure any of this out. Because also the elliptical of the earth and moon change too
hello sir....
can u pls help me with one qus?
why sun declination is constant but moon declination varies???
The reference point is the sun, which is virtually unchanging as the various planets complete their orbits around it.
We don't need the ellipticity of the orbit to peek behind the corner and see a part of the rear side of the moon. The Earth has a diameter of 12000 km. The moon is something between 300 000 and 400 000 km away. As we spin on Earth once around a day, we wobble side to side with a peak-to-peak amplitude of 12 000 km and that is more than the diameter of the moon. So the moon is apparently turning a bit and we can see part of the rear side. In other words: if you and your friend living on a different continent photograph the moon at the same time and then share the pics, they will be different. One pic will show parts which are not on the other pic and vice versa. Also, if you combine the pics, you get a stereo 3D picture. The rotation of the Earth is creating a parallax base of 12 000 km.
What you have failed to account for, is that because of the moon's elliptical orbit, there is a lag in the moon's rotation as it orbits the earth, meaning that we can see that small part of the moon's farside that otherwise wouldn't be seen.
If the moon's orbit was a perfect circle, then there would be no rotational lag and only the same parts of the moon would be seen.
This was all explained at the 2:40 point in the video, but for some reason, you appear to have either missed it completely or failed to understand what was being stated.
So I have a question what happens to the Moon when the sun hits the moon on the Darkside of the moon what happens then to the moon because I know it has to be a phenomenon for the moon to get Sun even though it does. but it's gonna get like at least five minutes this time around in the solar eclipse.
You seem to have this strange idea that the far side of the moon doesn't receive much sunlight?
In fact, the side of the moon that never faces earth receives slightly more sunlight on average, than the side that always faces earth.
You lost me at "by pure coincidence" 😂
Sir please tell me is it possible that any full moon day moon rises from east although sun is already there .
I think you are referring to a new moon, not a full moon.
A full moon will be on the opposite side of the horizon from where the sun rises.
11:51 I find it odd that the '50 years of solar eclipses' map / schedule missed the recent Oct 14 2023 American Eclipse. Only shows a narrow band extending over Australia for 2023.
Wow😮😮😮😮😮😮😮 omg
Sir,THIS IS BEST EXPLANATION ABOUT eclipses.Pin me sir.
"Pure coincidence" LOL! There are so many "coincidences" that they had to call it fine tuning. Not just of the universe but also of the Solar system
Are you one of these 'made by design' fools?
10:10 Looks like Dark Souls III
The moon is turned to the Earth on one side because its center of mass is shifted towards the Earth by 5 km. This must be taken into account when landing and when orbiting the Moon.
One Ring to rule them all...
Jupitorand saturn pulles moon towards earth
Nope.
bloodmoon is created by earth atmoshpere .you mean neon ? it doesnt make sense
Is this why the moon doesn’t “show up” some nights?
Of course.
Bob Shiruncle
1 second ago
how long does it take for the moon to spin around the earth?
a moonth.....
I see what you did there :)
Above the ecliptic? Below the ecliptic? The words "above" and "below" refer to the Earth's gravitation field. "above" means farther from the Earth, "below" means closer to the Earth. For example, Australians and Europeans have the senses of above and below reversed. This "above" and "below" the ecliptic doesn't make a sense to me at all. It's undefined to me. Meaningless. The ecliptic is a plane passing through the center of the Earth, so any vectors of the Earth gravitation field within the ecliptic are going to point in a direction within the plane, so "above" and "below" cannot be used to distinguish one half-space from the other.
From a reference point of view, it is common practice to say that the north pole is on top of the world, or in other words, above the equator.
It is only from this standpoint that the words 'above' and 'below' are used.
Your semantics can be left out of the discussion as being trite.
Interesting video, but why are we still able to see a FULL bright moon the DAYTIME if this model is accurate?
You can't see a truly 100% full moon during the day. You might see one briefly in twilight at sunset or sunrise, but never in the daytime. However, you might see a 95% full gibbous moon for an hour after sunrise, but 95% is not 100%.
The answer: we aren't.
😴
"The moon goes around earth" really should be "the moon goes around BY the earth", isn't it?
The reference to 'goes around', is another way of saying 'orbits around'.
@@sailorman8668 the moon does not 'orbit' earth.
@@zack_120 yes it does
@@stevencp yes, just tried to emphasize its 'no rotation' nature, including the One rotation per lunar month which is not a real rotation on its own but passively due to the tidal lock by the earth.
@@zack_120 You seem to be getting confused over the terms 'orbit' and 'rotation'.
Your assertion that 'the moon does not 'orbit' earth' is incorrect.
The moon DOES 'orbit' the earth, in the same way that satellites 'orbit' the earth.
Please try and keep up zack.
What are the chances they're the same size as the sun? No such thing as coincidence in the heavens. The earth is a stationary realm and the heavens is the ones moving, not earth. It's a perfect time piece of the creator.
Thanks so much for posting your indoctrinated rant, which by the way, hasn't helped to disprove the FACT that the earth is a spherical rotating planet.
And with regards to your assertion that the moon is the same size as the sun, this is OBVIOUSLY not the case.
They were gifted dark matter
What proof do you have that it is pure coincidence?
What proof do YOU have this it isn't?
@@sailorman8668 That it is incredibly rare.
@@user-gh3di2rc3o So is a royal flush.
u can c a half moon during the day
Indeed, so what?
Well riddle me this, Moon Man….I see the moon during the day and night. If its day in my area that means it’s night on the other half of the world. So how can I see the moon during the day (which is their night). This means the entire Earth can see the moon at the same time. If you hold a basketball up and a tennis ball and placed a micro miniature person on the side of the ball facing away from the tennis ball, there is no way for that person to see that tennis ball. Space is confusing.
Have you found the answer to your question yet?
If not, then maybe you need to watch a different video, in order to see the reasonings explained in a different way?
Incidentally, space isn't that 'confusing' at all - it's just that some people are a bit slow to grasp the basic principles straight away.
The moon is never visible to the entire earth at the same time. When you see the moon in the daytime, the night sky on the opposite side of earth has no moon.
7:13 i knew the earth was flat
How did you ever pass my class?
What are the odds of your presumptions? Two celestial bodies appearing the exact same size also our atmosphere creates a lens effect which is why the bodies look larger near the horizon overhead.
In your charts you displayed you had earth 🌎 8x bigger than the sun ... not possible... your theory is wrong...... 10:30
Regardless of the relative sizes of the sun, earth and moon as shown in the video, this doesn't change the fact that everything stated is the correct reason why eclipses are created.
Incidentally, if you don't agree with the reasonings given in this video, what is your own alternative reasoning as to what causes eclipses?
bs
Clearly, you didn't understand what was shown and explained in the video.
Very intellectual response, now go back watching flat brain cartoons adjusted to your IQ level instead of trying to get attention from grown up people.
when the moon is close to earth we have eathquakes we have storm we have vulcanos
These natural events also occur when the moon is not close to earth.
By Pure Coincidence.
Reductionist Ideology.
Draining and Boring.
What do you mean 'draining and boring'?
Did you not appreciate the actual complexity of the moon's orbit around the earth and the explanation and animation shown in the video?
@@sailorman8668
I think a more insightful deduction would be that the Sun Moon relation is not a co incidence.
Looks purposeful.
Give credit to the mind behind such precision.
Like Isaac Newton did.
@@peterjongsma2779 And what of the many other planets and moons in the solar system, where the size and distance relationship between them does not produce eclipses in the way they are produced between our planet and the moon?
I think you are reading way too much into this for your own religious gratification.
Do 'event's and 'circumstances' always need to be 'manufactured' to happen, or do they simply happen because of randomness and irregularity?
Just because something happens in a certain way at a certain time, this does not mean that credit needs to be given to some outside entity.
@@sailorman8668
Well this perfect eclipse is there for us to see.
I'm not on another planet.
The Earth is the only one habitable .
I recommend you watch
The Privileged Planet.
It discusses The Mediocre Fallacy that nothing is special.
Things are in fact very special.
@@peterjongsma2779 And what about an annular eclipse, where the moon's angular size is smaller than the sun's, meaning that an imperfect eclipse eventuates?
How shocking that some 'outside entity' would allow this 'mistake' to occur, lol.
Things are in fact very random and without specific meaning, unless you want to assign special significance to any event that 'appears' to fit your contrived narrative?
That eclipse umbera only works when you make the sun as small as you have, if make the sun 100x bigger and it cannot work, your diagram is seriously flawed.
@@sailorman8668 And when you try to act clever by spouting B/S everyone knows it.
Then the umbra would be even bigger idiot.
@@SoundONEDisco Exactly, which is why YOU are the one that looks foolish on this thread, not me.
@@sailorman8668 PMSL @ you
@@SoundONEDisco What you haven't realised yourself, is that even if the sun was made 100x bigger, you would also have to place it much further away, in order to simulate its 93 million mile distance from earth, so it's relative size would still remain the same.
You see what happens when you try too hard to make yourself look clever and you only end up making yourself look foolish.
this is not accurate at all. this "science" doesnt apply to the world we live in, its a very creative and elaborate explanation, however, but not reflecting what actually happens nor the how.
This is all preposterous because you do not factor in the Earth rotation every day night
The earth's rotation has no effect on whether there is a solar or lunar eclipse.
That's no coincidence. The Lord created it to be that way on purpose.
Actually, nobody created anything in order for eclipses to occur - this is all perfectly natural.