General astronomy

General astronomy

Industry: Astronomy

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General astronomy

erosion

Astronomy; General astronomy

the breaking down or building up of geological structures and transporting of material by ice, liquid, or wind.

escape velocity

Astronomy; General astronomy

the initial speed an object needs to escape a massive body's gravitational influence and never return.

event horizon

Astronomy; General astronomy

the distance from a black hole's center at which the escape velocity equals the speed of light. No information of events occurring inside the event horizon can get to the outside.

exoplanet

Astronomy; General astronomy

a planet orbiting another star (other than our Sun) beyond our solar system.

exosphere

Astronomy; General astronomy

uppermost layer a planet's atmosphere where the gases escape to space. Very low density gases heated by X-rays and ultraviolet light.

The increase in the time between two events as measured by an observer who is outside of the reference frame in which the events take place. The effect occurs in both special and general relativity, ...

spectral line

Astronomy; General astronomy

Light given off at a specific frequency by an atom or molecule. Every different type of atom or molecule gives off light at its own unique set of frequencies; thus, astronomers can look for gas ...