Question:

Do full moons on other planets always rise at sunset, new moons at sunrise, and quarter moons inbetween?

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How special is our moon-sun-earth setup? I know a solar eclipse is unique because the moon is the perfect size versus distance in the sky to make the corona visible.

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  1. Yes, its the same on other planets.

    Think about their positions to be full, quarter, new moons, etc.  Where are they located to get that much illumination/reflection from the sun.

    If need be, draw it out on paper as you expect it to be here on Earth, and try to find why it would be different on other planets.  


  2. Who really knows,nobodies been to another planet to find out,every thing else is conjecture.

  3. I don't believe in other planets, so no. When you look in the sky, what you see is a giant picture, it's an illusion "they" want you to believe in. We are the only planet

  4. Sure they do. The same circumstances that cause that to happen here, exist on the other planets as well.

  5. Do they occur the same way? Yes.

    Also, even when the Moon goes directly between the Sun and Earth, we don't always have a total eclipse, where the corona is visible.  When the moon is at apogee (furthest from Earth) we have what's called an annular eclipse - a ring of sunlight still shows.

    What is special about the Earth/Moon system is the size of the Moon relative to Earth. It's big.  Jupiter has bigger satellites than our Moon, but they are tiny in comparison to Jupiter.  I believe only Pluto has a larger moon (relative size) than us.

  6. On my planet, the 3 moons rise in unison. But there is only one full moon at a time. It would be beautiful to see all three full moons at the same time. That would just light up the sky's aurora borealis!!

    Nanu-Nanu (That's greetings from Ork).

    LOL, couldn't resist.

  7. The moons of Mars zip around pretty fast.  They zip by more than once a night.  Phobos orbits in 7 hours, 39 minutes.  So in a 12 hour night, it can set, then rise, or do other odd things.

    The similar angular size of the Sun and the Moon is a coincidence. The Moon's orbit is expanding, so the Moon's angular size is getting smaller.  Eventually we won't have total solar eclipses.

    But the geometry is what makes the Moon's phases at their various times. This has to be the same everywhere.

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