There are many other planets in many other galaxies.
1...Earth
There are four gaseous planets.
Earth has no planets of its own. It is one and has one moon.
nine
not that we know of. but the 8 planets we have, all of them dont except earth has life.
a lot
because the sun causes ther effect
tooo many to count
22
ulimited can not end
100
ther is 5
45
45 billion
0.001kl