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Bookmark or Share- Stellar classification | Types, Spectral Classes & Luminosity - BritannicaStellar classification, scheme for assigning stars to types according to their temperatures as estimated from their spectra. The generally accepted system of stellar classification is a combination of two classification schemes: the Harvard system, which is based on the star’s surface temperature,
- Astronomy | Definition, History, Discoveries, & Facts | BritannicaAstronomy is the study of objects and phenomena beyond Earth. Astronomers study objects as close as the Moon and the rest of the solar system through the stars of the Milky Way Galaxy and out to distant galaxies billions of light-years away.
- Star formation and evolution - Encyclopedia BritannicaStar - Formation, Evolution, Lifecycle: Throughout the Milky Way Galaxy (and even near the Sun itself), astronomers have discovered stars that are well evolved or even approaching extinction, or both, as well as occasional stars that must be very young or still in the process of formation.
- Astronomical observatory | Definition, Examples, & Facts - BritannicaAstronomical observatory, any structure containing telescopes and auxiliary instruments with which to observe celestial objects. Observatories can be classified on the basis of the part of the electromagnetic spectrum in which they are designed to observe.
- Star | Definition, Light, Names, & Facts | BritannicaA star is any massive self-luminous celestial body of derived from its internal energy sources. Of the tens of billions of trillions of stars in the observable universe, only a very small percentage are visible to the naked eye.
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