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vocab words 1-10-08
characteristics of stars
9
Science
5th Grade
01/10/2008

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Term
star
Definition
a hot ball of glowing gas
Term
giant star
Definition
a very large star, much larger than the sun
Term
parallax
Definition
the apparent change in position of an object when seen frm different places
Term
nuclear fusion
Definition
the process by which hydrogen atoms join together to form helium, releasing energy
Term
apparent magnitude
Definition
the brightness of a star as seen from earth
Term
absolute magnitude
Definition
the brightness of a star if it were a standard distance from earth
Term
supergiant star
Definition
a very large star, much larger than the sun ; also is bigger than a giant star
Term
Hertzsprung-Russell diagram
Definition
a graph related to the temperature and the brightness of a star
Term
planet
Definition
it orbits a sun and is solid
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