General astronomy

General astronomy

Contributors in General astronomy

General astronomy

Clayton Conrad Anderson (born February 23, 1959 in Omaha, Nebraska) is an American engineer and a NASA astronaut. Launched on STS-117, he replaced Sunita Williams on June 10, 2007 as a member of the ...

frequency

Astronomy; General astronomy

the number of wave crests that pass a point every second. Measured in hertz (Hz). For electromagnetic radiation, the frequency is inversely proportional to the wavelength.

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, ...

lander

Astronomy; General astronomy

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

regolith

Astronomy; General astronomy

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 ...

solar radiation

Astronomy; General astronomy

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

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.