The following outline is provided as an overview and topical guide to space science: Space science – field that encompasses all of the scientific disciplines that involve space exploration and study natural phenomena and physical bodies occurring in outer space, such as space medicine and astrobiology.

Branches of space sciences

Astronomy

See astronomical object for a list of specific types of entities which scientists study. See Earth's location in the universe for an orientation.

Astronautics

The science and engineering of spacefaring and spaceflight, a subset of Aerospace engineering (which includes atmospheric flight)