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Stars
Term | Definition |
---|---|
Star | A large celestial body that is composed of gas and emits light; The sun is a typical star. |
Apparent Magnitude | A brightness of a star as seen from earth. |
Luminosity | The actual brightness of an object such as a star. |
Absolute magnitude | Absolute magnitude is a measure on how a bright star would be if it were seen from a standard distance. |
Temperature | A measure on how hot or cold something is; specially of a measure of the average kinetic that particles in an object. |
Main sequence stars | Main sequence stars are stars that are fusing hydrogen atoms to form helium atoms in their cores |
Astronomical- unit | a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun. |