Planets

Stars

Dogs In Space

Milky Way

Asteroids

Comets

Meteoroids

Moon Phases

Astronomy is the scientific study of celestial objects (such as stars, planets, comets, nebulæ, star clusters and galaxies) and phenomena that originate outside the Earth's atmosphere (such as the cosmic background radiation).

Astronomy is one of the oldest sciences. Early cultures such as the Babylonians performed methodical observations of the night sky, and astronomical artifacts such as Stonehenge have been found from ancient times. However, the invention of the telescope was required before astronomy was able to develop into a modern science.