Why Do Eclipses Travel WEST to EAST?
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- Опубліковано 31 бер 2024
- The sun rises in the east, the moon rises in the east, and the stars rise in the east... but solar eclipses, oddly, come from the west. If total eclipses are caused by the sun and the moon, why don't they behave like the sun and the moon?
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An april 1st upload from an otherwise pretty inavtive channel that's not an april fools joke? Well thats a breath of freshair
The joke was everything measured in miles
You need to adjust your subscription settings if you think this channel counts as inactive. They upload frequently
@@d-m.n_--2 Only 6 videos in the past year isn't most people's definition of "frequent".
I think it was a typo, meant to be innovative@@d-m.n_--2
@@dkhl65Ohhhh I didn’t even realize this was MinutePhysics and not MinuteEarth (which posts a lot). I’m guessing the other guy didn’t either.
This reminds me of that Calvin & Hobbes comic where the his dad explains how a record works--that different parts are traveling different speeds and yet the whole thing always travels at the same rpm. Last panel is Calvin deeply distressed still thinking about it and coming to terms with it late at night lol
Another similar phenomenon is of course, The Merrigoro Conjecture. This is the experience of trying to spin your friend on a merry-go-round, and your friends perspective of how much effort is being put into it. If in the center, it feels like you're being skimped out of a spin. Closer to the edge you get, the more Gs you feel.
I haven't seen that specific strip yet, but I think what you're saying his dad describes is what's known as aristotles wheel paradox. It's very easy to understand. And it's a clear example of how the sun moves above and around the stationary flat earth model.
So basically:
It's just a mere coincidence given the rotation speed and size of our planet and the orbital speed and distance of the moon, just like how we live at a time where the Moon has the same average angular size as the Sun.
The REAL coincidence is the fact that from the earth's surface, the sun and the moon are the same size. No other planet has sun eclipses like the earth does -- moons usually are much to small for that.
@@kevskevs there is Phobos. It is almost big enough to fully cover the sun.
@@lemagicbaguette1917 Phobos is only about half as large as the sun in the Martian sky. It could still produce annular eclipses that would be interesting, but nothing like a total eclipse.
@@EebstertheGreat I see.
@@lemagicbaguette1917 Uh right, I might have forgotten Phobos. But would a Martian really notice Phobos transiting in front of the Sun? Recalling the eclipse of August 1999 in Europe, I claim that you couldn't really tell what was going on until about 90% of the Sun was covered (which Phobos is too small to do) ...
I've never seen such a clear, concise explanation of the path of an eclipse. Great video!
And yet I get nothing.
Welp, time to show this as proof against Flat Earthers...
its actually not concise, they showed 7.5 earth rotations for 1 moon orbit. in reality its 29 earth rotations to 1 moon orbit.
@@EdinProfaThe way I explain it is just that the moon moves very slow in the SKY to the point we don’t really notice, it seems fixed to the stars. And we happen to “rotate” the sky faster than the moon “moves”. So thats why it rises in the East like everything else in the sky.
Now ellipses move west to east because the moon is moving into a fixed point (the sun) in the sky. Yes, the whole sky is moving but relatively to their positions in the sky the moon is moving in to block the sun. This blocking will obviously happen in the same direction as the moon is moving in (relative) to the sky.
I've still never believed that it wasn't just butter the entire time 🤔 🧈 #iWantToBelieve
May your skies be clear, everyone! Good luck on Monday!
May nothing obstruct your view of the sun, except for the moon!
@@jeremykraenzlein5975I like this one lol
Update: looks like much of the contiguous US ended up having heavy clouds, but here in Bloomington, IN, the weather couldn't have been better!
@@ronkalinovsky6898 I was about 15 miles south of Cleveland. There were clouds, but very thin ones, which still allowed an awesome view of the eclipse. We could even see Venus and Jupiter through the clouds, though the cloud-cover was probably the reason why we couldn't see any stars. But in spite of those clouds, we certainly got the full eclipse experience.
mars's moons revolve in the same direction around mars but appear to move opposite directions in the sky. this is one of my favorite mildly cursed moon facts
Well, Phobos does -- it orbits lower than Mars's synchronous orbit, so it moves west-to-east in Mars's sky, just like low-Earth-orbit satellites do on Earth.
Deimos, meanwhile, orbits a little _above_ Mars's synchronous orbit, so it moves east-to-west in Mars's sky ... albeit fairly slowly compared to the Sun.
Thanks, I hate it 😮
Thanks, I love it
Ive never seen so many people talk with such certainty about something thats impossible by most to ever observe.
@@modera.torrent_ Thank you! lol
This has bothered me for so long. Thank you so much for explaining it so clearly.
im so confused
The moon's orbit around earth is faster than earth's rotation on its axis.
I live in Atlantic Canada and I've been looking forward to this eclipse for about 5 years now. Thanks for a greatly informative video.
how did it go? was it worth the 5 year wait?
@@hi91023 Yes! We had a great view! Initially, forecasts were negative, then, by some fluke, we had very clear skies. I got a great panorama during peak occlusion. I adds a bit that it's a rare event. If it happened every day we wouldn't pay much attention.
If the speaker would slow down and give us a moment to absorb the information, this might make sense!
You can slow down the video.
I'm technologically challenged.😂
@@donnahall1670 Have you found out how to change the video playback speed yet Donna?
@sailorman8668 no I haven't.
@donnahall1670 In the settings there's an option to slow it down. I think it's called playback speed.
Quality video and straight to the point
Thank You for this answer! I have been asking so many Science channels this question and you were the 1st to answer. Much appreciated!
Quality video! I never thought about it that way
A bit tangential, but this is basically the first time ever when I gladly and willingly watched the ad at the end of a UA-cam video.
(I'm 43 and I mainly clicked the video to see if my guess was right (it was) but I really liked your comprehensive explanation and I wish we had this kind of content back when I was in school)
I had an argument with my aunt's boomer friend about how the earth rotates and orbits the sun at the same time. She thought the earth was stationary and only rotated. So i asked her what she thought a year represented. She said "the time for 4 seasons to pass". So i asked why she believed seasons happen, and she looked so puzzled. She goes, "geez, I mean, Ive never even considered asking that question in my life. I thought, you know, they just did 🤷♂️ ". Granted she did quit going to school at 13 when her father offered her a job opportunity (I think it was still a time when some people thought womens education didnt matter too much)
@@modera.torrent_ it's very sad that so many people have absolutely no clue about basic astronomy and the consequences of that to their lives here. Unfortunately, science education in the US of A is very poor and lagging far behind most countries with comparable level of development.
@@modera.torrent_ This stupid woman you are talking about probably also thinks that the moon's phases are caused by the earth's shadow.
I knew this but had a hard time explaining to the you know... 6yo. Great job. I'll just repoint the ones with questions to your video!
Great video!
I hope this is a sign of a new renaissance in minutephysics videos
This is a brilliant explanation!
+
Thanks for the educational explanation.
I am trying to understand why the direction of the moon shadow is travelling north east and the last time there was an eclipse it travelled south east
What is the difference?
Hmmm, I always thought it was a lot simpler than this. All celestial objects (including the moon) passively rise in the east and set in the west (due to the earth’s rotation in the opposite direction), but since the moon is actively moving in a path west to east (about 13° daily), then it makes sense that the moon’s movement would appear to cause an eclipse from west to east.
The end of the video actually shows why this simple answer isn't good enough- since by changing the speed of the moon or its distance from earth you can make the paths go in different directions.
This is WAY MORE complex than I could comprehend initially, his visual graphics were at least helpful!
This broke my brain, thanks for putting it in this context!!
I have the same impression :)
Very good approach 😊
Outstanding ❤
Thanks for explaining this
Awesome explanation
He talked WAY TOO FAST, faster than my middle-aged mind could understand! So I do so appreciate his visual graphics as I've always been the kind of person that learns better by visual demonstration than by hearing an explanation of something! In other words I comprehend something better visually than auditorially! So I also read the transcript at a slower pace, but to be quite honest, its still a complex astronomical phenomenon to me! I'd have a hard time explaining it to someone, I would just direct them to this UA-cam video!😅
If I found the commentary too fast, I would have gone into the video 'settings' and changed the 'playback speed' to '0.75' - did this actually not occur to you Barry?
0:45 is similar to the retrograde of Mercury optical illusion. Since Mercury's orbital speed is faster than Earth's, when Mercury catches up to Earth, its orbital trajectory appears to loop back on itself from our vantage point.
Ditto for Venus.
In fact, something similar can happen with _any_ planet. A planet outside the Earth's orbit will appear to slow and move "backwards" from its usual path whenever the Earth is lapping that planet in its orbit.
I considered a similar idea a while back and I think there is a neat bit of orbital math as to how objects in our orbit appear to be moving from Earth. Basically, if they are close they can appear to orbit east to west or west to east depending on how they orbit Earth. When you get to the geosynchronous orbit, objects can appear to just stay in place if they move along with the Earth's rotation. Beyond that orbit though, objects will always appear to move from East to West since their angular speed is slower than Earth's rotation (or they can run against the rotation, which would still be East to West).
I’ve been randomly looking at eclipse maps for the last year. Today I find out they actually travel west to east!!! 🤯
tbh i barely understand any of this and dont know anything about eclipses but I'm here watching this bc i literally just had a dream a few days ago that the sun was coming from the west and going east.... and i see a map with a line on it that shows the sun moving in this same direction....west to east.....🤐 i was verry tired when i dreamt this and thought that was why i had a really weird dream. we were outside and 2 others said what is that 😰 i looked at the sky as well and was equally shocked and i told them....."this is the sun rising from the west.... okay.. its here"......😅
Science evolving to meet narrative? Last eclipse was east to west.
Is the use of miles in a physics video a sick april 1st joke?
I was happy to see it
While for understanding the concept one only needs to see which movement is faster than which other, it would be preferable to have these numbers in units which are internationally understood and accepted…
The audio and presumably CC are in American English, so imperial units are an appropriate choice.
I wish people would relax about squashing non-metric units.
@@hoebare I think it gets to people because many countries almost exclusively use metric, whilst USA will use either metric or imperial depending on the context or the individual.
@@hoebareWe squash non-metric for a reason.
Every time there's more than one object in motion in space I get massively confused. This is known as the two-body problem. (Thanks for a great explanation!)
We are not worthy of receiving such a brilliantly concise and masterfully explanatory piece 🙏😅💪
Going to travel into the eclipse path with my girlfriend this year! So excited!
I think there's a mistake around 3:20. You have the moon listed as orbiting the earth 12 times/year, but the actually number is a bit over 13 times per year. Is this correct or am I misunderstanding your diagram?
Apologies if someone else pointed out first: I didn't see any comments of this nature on a quick skim.
I love the music.
It would have been nice to have the SI units as well
The units are irrelevant. The velocities could have been in furlongs per fortnight and still have been just as informative and helpful.
@@hoebare Maybe, I cannot possible tell. I was too busy calculating and converting in my head to pay attention
Yeah, but a lot of Americans would have been upset. They know how we metric people work. When they give an inch, we take a kilometer.
That’s the April Fools joke
@@hoebareusing the furlong will help horses understand it better! LÓ-L
Thanks!
Nope. Still didn't get it
Thank you for blowing my mind. Unfortunately, I couldn’t keep up.
I'm with you... I had to replay a number of times! Love the idea of "MinutePhysics", but it humbles me. I thought I was more intelligent. *sigh* However I did get it after some persistence! Very good explanation.
Circle math gets wild quickly and way counter intuitive.
This is really interesting.
Solid differential geometry exercise for those learning about curves and surfaces.
How did you paint over the earth and keep the line as you move the planet, at 2:47?
Reminded me of Mercury's retrograde orbit when observed.
This doesn't make sense. 1:35 the illustration shows moon appearing or rising in west and setting on east
Basically a lesson on angular velocity vs. linear velocity.
:) miss Henry making videos man.
Great video slow down! your talking faster than the Moons movement
Yeah, this guy should be an auctioneer! I had a hard time understanding his explanation!
Fast? It's not that fast.
If I found the commentary too fast, I would have gone into the video 'settings' and changed the 'playback speed' to '0.75' - did this actually not occur to you?
If the moon was in a lower orbit the time of an orbit would NOT stay a regular month long. Orbital period and velocity of a stable orbit fluctuates based on it size.
A related question: In photos of the eclipse, the solar disk, including coronal features and prominences, seems to rotate relative to the horizon. Like, in the sense of a clock. Presumably, Earth's rotation is responsible for a lot of this, but I tried to calculate it to adjust the SOHO images to match the orientation at my location, and couldn't get a number that made sense. There is some combination of spherical trigonometry and axial tilts involved. Help me understand?
Well presented!!!!!
Thanks
if a planet and moon were perfectly sized so that the shadow moved in pace with the surface of the planet, what's the longest you could get totality in a single spot assuming relatively realistic body densities and such?
so how fast was Cat Stevens traveling?
…őr Yusuf (Islam)
I've always loved eclipse's but i have a question about them and I have never heard anyone ask this question.... can a total eclipse path take the same exact path again hundreds or thousands of years later if not why?
Its now on my uncompromising bucket list to see a solar eclipse at night
You did a great job explaining this mystery. However, it would be much more understandable if you spoke slower.
I had to go to settings to make sure it wasn't on 2X speed...
YOu're blood is worth bottling!! I was, seriously, trying to get my head around a diagram of upcoming eclipses world wide and was ... 'why don't they all go the same way, why are they going in different directions, what the heck is happening here!!?' Thanks so much for modelling this in a minute ... love yer work!!
+1
Great idea - great video
cool one
can u do , clone paradox (the cloning machine)
Before watching: The short answer is that the moon moves across the face of the sun from west to east, because the moon orbits the earth from west to east. I'm sure that the video will explain more, so I'm looking forward to watching it!
Shorter answer: Moon is between earth and sun, thus person experiences that sun rises from the east so shadow must go west->east.
@@TheMehukas
That's not correct, since it would need much closer Moon and much bigger Earth, for parallax to cause such movement of Moon's shadow.
@@TheMehukas That doesn't explain it. It's my answer (how the moon moves) combined with the part that I missed, but the video included: that the surface of the earth moves west to east slower than the moon's easterly motion across the face of the earth. The direction of the sun's rising is irrelevant. If the moon's relative motion, minus the motion of the earth's surface results in a net easterly motion, then the shadow will move to the east regardless of the sun's apparent motion.
@@HolySoliDeoGloriaI don't understand, if moon rises on east, the eclipse shoud be seen first in New York not in Mazatlán
@@master_wa-chu-sei7137 The video does a great job of explaining this. Where the sun or moon rises doesn't matter. The shadow travels east (generally) because the speed of the moon's passage over the earth (which is west to east, which is the direction of the moon's orbit around the earth) is greater than the speed of a point on the earth's surface as it rotates around the earth (also west to east). The difference between those two speeds roughly gives the speed of the shadow. (The moon also travels at an 18-degree inclination to the ecliptic, or the path of the sun, and the earth's surface is curved, so there are a lot of factors that modify the speed and shape of the shadow's path.)
Where are you guys going for the eclipse?
I really wish they released the video with all the directions being backwards, then after April Fools, replace that video with one where all the directions are correct under the same video name... that would really screw with people heads...
So, at some point in the past, the speeds of Moon shadow and Earth rotation were synced in such a way that eclipses would last much longer at any given spot ithey passed over.
Now my brain hurts. I need this explained over the course of like 20 minutes.
As an engineer, astrophysics always breaks my brain.
Seems like this video contains some really informative information, but it’s presented so quickly that you would need to have a supercomputer brain to digest it all in real time. I was lost about 15 seconds in.
Perhaps it would help to have the commentary slowed down somewhat - you know how to change the playback speed of videos, right?
Interesting
wouldn't the moon orbit faster, if closer to earth? I got confused there a little bit. In Orbital mechanics, bodies with a higher energy state orbit slower and bodies with a lower energy state orbit faster (energy state being the median hight of the orbit)
Can you explain with geocentric theory?
An apocalypse.
kinda unfair that we were born with such an underpowered brain considering how complex the universe seems to be
The April Fool's joke is that there is a blank frame at 1:43
Watching the video
He was trying to prove how smart he is.
I was wondering about this when I learned NASA is sending a research plane to fly in the eclipse shadow and it only gets a few minutes
I have a question is it possible for the path of an eclipse to take the same path hundreds or thousands of years later down the road even though I've never heard it happening but I think it's possible and if not why not
No, because the Moon is moving further away from the Earth and the geometry is constantly changing.
@@garethhanby
Ok, now I understand👍🏿 I just looked up the first eclipse ever recorded was May 28 585 BC that's amazing no 2 paths will take the same path ever again
The video is too fast that rotation of moon + earth together
Imagine a world where the moon travels exactly at the same speed as the planet's rotation so it stays in one place for a few hours.
so it's kinda like two rolling shutter artifacts stacked
If you were in a single engine plane. How long could you stay in totality
Still only a few minutes. The shadow moves so fast that it wouldn't make much difference compared to being on the ground. A Boeing Dreamliner managed to stay in totality for 9 minutes a few years ago. Concorde-001 managed 74 minutes in 1973.
This channel has 5 million subs
A month for the moon is a basically a year for the moon lol.
0:49 you said that earth's rotating speed is faster than moon's orbital speed.
Then at 1:25 you said earth rotates slower @1000mph.
This is creating confusion. Can you please elaborate
The Moon's orbit is *_60 times_* longer than the Earth's circumference around the equator so it has to move more than *_twice_* as fast to cover that distance during its orbital period of 27.3 days.
Note that the 27.3 days is the Moon's orbital period relative to the background stars, but it takes about two extra days to get back to the same position relative to the Sun and thus the same phase since the Sun's apparent position also has moved about 27° eastward due to the Earth's orbital movement.
Imagine being Galileo and trying to reverse-engineer what he's observing in the sky on paper! 😲
Nice video. In short, the Moon has a faster absolute speed and a slower angular speed around the Earth.
Never been so early
This presents such a weird paradox in my mind. So (from the perspective of Earth's surface) the shadow of the moon is moving faster across the face of the Earth than the moon is moving through the sky.
Have you been in front of a wall, by night, looking at your shadow, while cars passed by you? Did your shadow move at the same speed you were walking, or faster (in whichever direction? Did your shadow move even if you were just standing?
This video doesn't show that extra bit angular movement of the shadow. Anyway, it's just like 3 min. long and eclipses are pretty complex things.
@@MariaMartinez-researcherbut sun doesn't move like a car
That should say 13/yr because Earth 1(the moon)'s orbital period is 28 days, not 30. 365/30≈12 and 365/28≈13
It depends on what kind of orbital period you use!
The Moon's *_sideral_* period (relative to the background stars) is 27.32 days while its *_synodic_* period (from one phase to the same phase again) is on average 29.53 days.
The difference between the two is due to the Earth's orbital motion around the Sun. When the Moon has finished one orbit relative to the stars, the Earth has moved nearly 27° in its orbit. This makes the Sun appear to move 27° eastward in the sky from our point of view, and it takes the Moon two extra days to catch up with the Sun and return to its initial phase.
Answers to questions no one was smart enough to ask.
I really want to see what it looks like from the ISS point of view
Their Internet don't work in this case scenario
With my luck the eclipse next week will occur while it is cloudy.
Before you watch this and let someone spoon feed you the answer, you should think about why the answer is what it is by yourself.
Can we assume from your comment, that you haven't been 'spoon fed the answer' and you can tell us all what YOUR explanation is for why the moon's shadow travels in the direction it does during a solar eclipse?
I mean figuring it out by yourself will only give you the same answer this video provides you anyway. What difference does it make?
Just out of interest, was your answer different to what was explained in this video?
If it was, perhaps you could explain how you came to the conclusions you did?
I really am in that unlucky part of the world where there is never total eclipse. No ring of fire.
South asia.
*Sssshhhhh*
What’s that? Oh yeah, it’s the flat-earthers fuming because their disc model doesn’t explain this, for the billionth time.
I was just arguing with a flat Earther about this when you posted this video tysm
Uploaded on April 1st because earth is flat obviously
@ezraclark7904 excuse you? Flat snowglobe earth is mankind's greatest lie! It's all about the dino nuggie earth
This is wrong and total bs. I'm making a video explaining how the eclipse proves that earth is not rotating.
@@alexfarias5156 = DELUDED FLAT EARTH BELIEVING FOOL.
Because our Moon circles the Earth travels in a counterclockwise direction.
What's up with eclipses? last 3 out of 4 videos are on eclipses
theres an eclipse on april 8, heading over the usa
Ha! It isn't a joke! He got me.