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Stars
Part 1 of Paper
....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 sunlight. Except
for the SUN, which is the nearest star, stars appear only as points of
light, even in the largest telescopes, because of their distance.... Part 2 of Paper
....s
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 groupings called
galaxies. Our GALAXY, the Milky Way, contains more than 100 billion stars.
Because tens of millions of other galaxies are known to exist, the total
number of stars in the uni.... |
| Number of words: 3925 - Approximate pages: 15 |
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