Since humans first walked on the Earth, we have gazed and wondered what's beyond our atmosphere. Astronomy, is the science of celestial objects, space, and the physical universe.
We have studying astronomy since 1600 B.C., there were the first written astronomical observations were by the Babylonians which recorded position of planets, times of eclipses, etc.
Here are some topics in astronomy:
Our Sun
The Moon
The Planets
Space Exploration
Mission to Mars