Glossary of Space Exploration Terminology

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K
K-band
A range of microwave radio frequencies in the neighborhood of 12 to 40 GHz, used for high speed data transmission on shuttle flights (~15 Ghz).
Kelvin
Scale of temperature named after the English physicist Lord Kelvin, based on the average kinetic energy per molecule of a perfect gas. Absolute zero is equivalent to -273.16oC (-459.4oF).
Kerosene
A mixture of hydrocarbons distilled from crude petroleum; see RJ-1, RP-1.
KHz
Kilohertz, equal to 1,000 Hertz.
Kilogram
The standard unit of mass in the metric system.
Kinetic energy
An object's energy of motion; for example, the force of a falling body.
Kosmobuksir
Russian name for "space tug".
Kosmolyot
Russian name for "spaceplane".
KSC
Kennedy Space Center (Florida).
KT
Kilotonne, equal to 1,000 tonnes.
Kuiper belt
A swarm of cometary bodies thought to orbit the Sun beyond Neptune at distances between 30 and 50 AU.

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Rocketry & Space Technology

Glossary courtesy of Robert Braeunig's
Rocketry & Space Technology website.