Via iO9:
Our
moon is a pretty big object. It's big enough to be a respectable planet
in its own right, if it were orbiting the sun instead of the Earth.
(Actually, it is orbiting the sun in a nearly perfectly circular
orbit, that the Earth only slightly perturbs... but that's a topic for
another day.) The Moon is a quarter the diameter of the Earth. Only
Pluto has a satellite that is larger, in proportion to the size of the
planet it orbits.
But what if
the Moon were size of Mars, instead? It would like the picture above.
Check out how some of the other planets of the Solar System would look in our sky, if they took the Moon's place.
