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star
| Term | Definition |
|---|---|
| star | a fixed luminous point in the night sky that is a large remote incandescent body like the sun |
| apparent magnitude | the magnitude of a celestial object as it is actually measured from the earth |
| luminosity | the intrinsic brightness of a celestial object as distinct from its apparent brightness diminished by distance |
| absolute magnitude | the magnitude brightness of a celestial object as it would be seen at a standard distance of 10 parsecs |
| temperature | the degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch. |
| main sequence stars | in astronomy the main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness |
| 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 |