Galaxies Flashcards Test
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| A. over billions of years the star becomes stable.B. it is the force that keeps the earth from flying away from the sunC. Stars are luminous because it is a result of nuclear reactionsD. There are large gas clouds in space, called nebulae.E. the solar system's terrestrial planets are: Mercury, Venus, Earth, and MarsF. 1. The object must orbit a star such as our sun
2. The object must be big enough to allow its own gravity to pull it inwards to make it look like a sphere
3. the object must be big enough to allow its own gravity to move other objects around itG. Planets orbit around the sun which is the major point of gravitational pullH. A galaxy is a collection of millions or billions of stars, along with gas and dust all held together by gravitational forcesI. when the star has used up all its supplies of hydrogen in its core, it begins burning helium on its outer partsJ. once the red giant has turned all the hydrogen that it contains both in its core and on its surface to heliumK. the Jovian planets are the gas giants in our solar system: Jupiter, Uranus, Saturn, and NeptuneL. nuclear reactions occur between two hydrogen atoms when they fuse to become HeliumM. phase 1 - formation
phase 2 - the stable period
phase 3 - the red giant
phase 4 - the white dwarf |
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