General astronomy

General astronomy

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General astronomy

Solar wind

Astronomy; General astronomy

A stream of charged particles released from the upper atmosphere of the Sun, mostly consisting of electrons and protons with energies usually between 1.5 and 10 keV.

Solvent

Astronomy; General astronomy

A substance that dissolves a solute (a chemically different liquid, solid or gas), resulting in a solution, usually a liquid but can also be a solid or a gas.

A layer of loose, heterogeneous material covering solid rock, which includes dust, soil, broken rock, and other related materials and is present on Earth, the Moon, Mars, some asteroids, and other ...

Absolute zero

Astronomy; General astronomy

The lowest possible temperature, a hypothetical temperature, At absolute zero all molecular movement stops. All actual temperatures are above absolute zero. Absolute zero would occur at -273.16°C, ...

Solar radiation

Astronomy; General astronomy

The total frequency spectrum of electromagnetic radiation given off by the Sun, particularly infrared, visible, and ultraviolet light.

Lander

Astronomy; General astronomy

A spacecraft which descends toward and comes to rest on the surface of an astronomical body.

Sidereal day

Astronomy; General astronomy

- the interval between two successive passages of the vernal equinox over the meridian, being about four minutes shorter than a mean solar day. A sidereal day is approximately 23 hours, 56 minutes, ...