General astronomy

General astronomy

Industry: Astronomy

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General astronomy

isotropic

Astronomy; General astronomy

exhibiting the same property when looking in any given direction.

temperature

Astronomy; General astronomy

a measure of the random motion energy (the average kinetic energy) of a group of particles in a gas, liquid, or solid. The temperature is higher if the particles are moving faster.

a logical, systematic set of principles or explanation that has undergone testing or validation from careful observations and has stood up against attempts to prove it false. A scientific theory can ...

thermal spectrum

Astronomy; General astronomy

a spectrum that has energy at all wavelengths (a full rainbow). Produced by solids, liquids, and dense (high-pressure) gases.

thermosphere

Astronomy; General astronomy

upper layer a planet's atmosphere where the temperature rises with increasing altitude because the gases absorb X-rays and ultraviolet light. X-rays ionize gas particles. Aurorae occur in this layer.

time zone

Astronomy; General astronomy

interval of longitudes 15 degrees wide in which every clock is set to the same time (e.g., every clock in the Pacific time zone will give the same time).

total solar eclipse

Astronomy; General astronomy

a type of solar eclipse that happens when the Sun and Moon are exactly lined up and the Moon is close enough to the Earth to totally block the Sun's surface (contrast with annular eclipse).