Archives: Glossary Terms: 691 terms

The apparent dimming of star or planet when low on the horizon due to absorption by the Earth's atmosphere.

A term that means outside of or beyond our own galaxy.

A planet orbiting a star other than the sun. Exoplanet.

A term used to describe anything that does not originate on Earth.

The lens at the viewing end of a telescope. The eyepiece is responsible for enlarging the image captured by the ...

Bright patches that are visible on the Sun's surface, or photosphere.

False dawn or zodiacal light is a rare optical phenomenon that occurs around sunset and sunrise, usually during early spring ...

Flight Data Subsystem.

Far Encounter phase of mission operations.

The circle of sky that you see when you look through a telescope or binoculars. Generally, the lower the magnification, ...