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Stars
Part I of Essay
A star is a large ball of hot gas, thousands to millions of kilometers
in diameter, emitting large amounts of radiant energy from nuclear
reactions in its interior. differ fundamentally from planets in that
they are self-luminous, whereas planets shine by reflected sunligh .... Part II of Essay
.... gamma) Ursa
Minoris, and Betelgeuse, in Orion, is gamma Orionis. VARIABLE STARS (those
which periodically change in brightness) have lettered names, such as RR
Lyrae in the constellation Lyra. Fainter stars are known by their numbers
in a catalog; HD 12938 is the 12,938th star in the Henry Draper Catalogue.
CHARACTERISTICS OF STARS
Each star in the universe has its own position, motion, size, mass,
chemical composition, and temperature. Some stars are grouped into clusters,
and stars and star clusters are collected in the larger groupi ....
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Words: 3925 - Pages: 15
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