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Message Subject Calling Astro...Please come in and explain how this works???..It's freaking me out.....
Poster Handle Anonymous Coward
Post Content
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Everyone should be able to understand how this works from this video.

The moon has to travel a tiny fraction of it's orbit in order to travel across the sun.

It should be pretty obvious.
 Quoting: Anonymous Coward 78954816


Sorry? Are you trying to say something?
 Quoting: leader


That video explains in easy to understand terms why the place where you can see solar eclipse travels from west to east.

It's quite simple, really. So there's no need to argue over it.
 Quoting: Anonymous Coward 78954816


I already proved that the video is wrong because the speed of the Earth and moon doesn't matter in this case, what matters is the angular speed of Earth's rotation and the angular speed of the moon's orbit around the earth. Did you not read my proof?
 Quoting: leader


I tried to read everything but I didn't quite get what you meant by that.

The only thing that matters in my opinion is how fast the Earth rotates and how fast the Moon goes by that portion of its orbit where it's blocking at least some portion of the Sun from view on Earth.

If you think about it, the Moon is just able to cover the Sun when a total eclipse is happening. So for a rough estimate, we can calculate the moon's diameter times two for the distance the Moon is covering at least some part of the sun when viewed from Earth. So all we have to do is take the Moon's diameter times two and divide it by the speed per hour the Moon is traveling at and that will tell us the time it takes for the Moon to travel across the Sun.

So we'll take The Moon diameter and multiply it by two 3 474,2 km * 2 = 6 948,4 km and divide that by the speed of the Moon 6948,4 km / 3,700 km = 3,700 = 1,878 and that is how many hours roughly it would take for the Moon to go across the Sun if viewed from a single non-rotating point on Earth. The rotation of course makes the time a bit longer as the same point on Earth is traveling in the same general direction with the Moon.

So that's my take on it and I'm fairly sure that's in the ballpark for this type of an example. You can see how the two hours of partial eclipse is faster than the rotation of the Earth and that's why the eclipse moves from West to East.
 
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