Absolute zero

Absolute zero

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, -459.69°F, or 0

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Category: General astronomy
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absolute zero

Automotive; Automobile

The point at which there is a total absence of heat, minus 459.67°F (-273.15°C)

absolute zero

Natural environment; Coral reefs

The temperature at which all motion will cease (0 degrees Kelvin or -273.15 degrees C).

absolute zero

Engineering; Electronic engineering

The temperature –273.16°C (_459.7°F and 0 Kelvin). The coldest possible temperature, representing the complete absence of heat energy.

absolute zero

Astronomy; General astronomy

The lowest possible temperature, attained when a system is at its minimum possible energy. The Kelvin temperature scale sets its zero point at absolute zero (-273.15 degree on the ...

absolute zero

Physics; General physics

The temperature of - 273.16 or 0 K at which molecular motion vanishes.

absolute zero

Geography; Physical geography

Temperature of -273.15° Celsius. At this temperature atomic motion stops.

astronomical unit (AU)

Astronomy; General astronomy

Approximately equal to the mean earth-sun distance, which is about 150,000,000 km or 93,000,000 miles. Formally, the AU is actually slightly less than the earth's mean distance ...

celestial coordinates

Astronomy; General astronomy

Any system for locating the positions of objects on the celestial sphere. Various systems are defined, according to the chosen point of observation (the origin) and the plane of ...

distance modulus

Astronomy; General astronomy

The difference between the apparent magnitude of an object, m, corrected for *interstellar absorption, and its absolute magnitude, M. This difference is directly linked to the ...

luminosity class

Astronomy; General astronomy

A classification of stars according to their luminosity, which can vary widely for a given *spectral type. Luminosity class indicates, for example, whether a star is a supergiant, ...

asteroid

Astronomy; General astronomy

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elliptical galaxy

Astronomy; General astronomy

A type of galaxy with a smooth, featureless circular or elliptical appearance, no spiral arms, and little or no interstellar gas or dust; symbol E. Elliptical galaxies range from ...