An astronomer studied the science of celestial objects and phenomena called astronomy. They discovered new stars, planets, supernovas, and mapped constellations. It was usually regarded as a lifelong occupation for people who spent their entire lives on only one planet.

The bright skies of Coruscant prevented amateur astronomers from studying space from that planet.

Astronomy was a subject taught at many schools across the galaxy, including the Jedi Temple where Anakin Skywalker learned it. Astronomy was among one of many subjects that DJ-88 taught Ken.

An astronomer on Tamban first "discovered" the Koornacht Cluster, and named it after Aitro Koornacht.