Ever wondered what would you  see on a Full Moon day, if you were on the Moon?

Answer: It depends.

It depends on where you are standing on the Moon.  If you are on the far side of the Moon that is always turned away from the Earth, then you would be standing in the lunar night. Pretty much you’d see what you would see from Earth in a dark night sky. Except that there won’t be the Moon. And of course, there won’t be Earth too, because you are on the far side.

If you are on the near side of the Moon that always  faces the Earth, then it is your daytime!  So you would see the Sun, and you’d see a New Earth – which actually can’t be seen, unless of course, it is a solar eclipse occurring at your location on the Moon (which in turn means it is a lunar eclipse for your friends on the Earth).

Since there is no atmosphere, and no dispersion of light, you could see stars and planets, if you can somehow block the sunlight!

Stellarium makes it easy to visualize that. Here is a screenshot from a time few hours from now, when the Moon appears full for earthlings.



You can see the “New Earth” pretty close to the Sun, but not close enough to cause an eclipse.  As an aside, there are three planets, and parts of three constellations of the zodiac visible in the screen shot. Click on the image for a better view.

Any guesses?