Excellence Award in the 'Dream Big 2013' competition

I am the fourth planet, Mars,
Gliding between the moons and stars.
Hot and dry, no life at all,
I am so tiny, I am so small.
Not very far from the sun,
Living there wouldn’t be much fun!!!
With asteroids and comets passing by,
Mars would have a very interesting sky.
Some say there’s life, is it true?
Well, scientists would tell you if they knew!