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Astronomy glossary

Simplified definitions of key terms in space exploration and astronomy, illustrated by the missions and spacecraft in the TRACKER-1 catalog.

A

Asteroid Astrobiology Atmosphere Aurora

B

C

CNSA Comet Coronagraph Cruise (interplanetary transit)

E

Earth orbit Eclipse ESA Exoplanet

G

H

I

Infrared Interferometer ISRO

J

L

Lagrange point Lander Launch

M

Magnetosphere Mars Microgravity Milky Way Moon

N

R

S

Sample Solar flare Solar System Solar wind Space probe Space station Space telescope Spectrometer Spectroscopy Star formation Subsurface ocean Sun Supermassive black hole Supernova

T

Transit (exoplanet)

U

X