General astronomy

General astronomy

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General astronomy

AE Aurigae

Astronomy; General astronomy

Runaway star which diverges from a comparatively small area in Orion.

Peculiar star whose metallic lines are as strong as those of the F stars but whose hydrogen lines are so strong as to require that they be classed with the A stars. They are generally short-period ...

absolute temperature

Astronomy; General astronomy

Temperature measured on the Kelvin scale: 0 Kelvin = -273.15 degree Celsius. Absolute temperature is directly related to (kinetic) energy via the equation E = kBT, where kB is Boltzmann's constant. ...

ablation

Astronomy; General astronomy

Removal of material from a solid by heating, vaporization or collisions

absolute magnitude

Astronomy; General astronomy

1) A measure of the intrinsic brightness of a star or galaxy. Absolute magnitude is defined as the apparent magnitude the star or galaxy would have if it were 32.6 light-years (10 parsecs) from ...

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 Celsius scale, and ...

absorption line

Astronomy; General astronomy

1) Dark line in a spectrum, produced when light or other electromagnetic radiation coming from a distant source passes through a gas cloud or similar object closer to the observer. Like emission ...