Archives: Glossary Terms: 691 terms

A range of frequencies or wavelengths.

Light is the fastest thing in the universe. It travels 186,282 miles (299,792,458 meters) every second.

Grass-like patterns of gas seen in the atmosphere of the Sun.

A galaxy that contains a prominent central bulge and luminous arms of gas, dust, and young stars that wind out ...

Solid State Amplifier in a spacecraft telecommunications subsystem, the final stage of amplification for downlink.

Solid State Imaging Subsystem, the CCD-based cameras on Galileo.

A giant ball of hot gas that creates and emits its own radiation through nuclear fusion.

A collection of stars orbiting a common center of mass. Open clusters typically contain a few hundred stars and may ...

A mirror or prism in an elbow-shaped housing that attaches to the focuser of a refractor or compound telescope. It ...

A group of people who get together to view the night sky. Astronomy clubs often hold star parties to introduce ...