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23 Cards in this Set
- Front
- Back
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Who proposed the Idea of the Milky Way Galaxy
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Harlow Shapley
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What is a Binary Star
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Two stars which revolve around eachother
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What is a constellation
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Groups of stars in which people at one time thought they saw imaginary figures
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What is a Nova
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- Gases from a companion star begin to increase and strike the surface of a nova star causing a nuclear explosion.
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Galaxies from Youngest to Oldest
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Spiral, Elliptical, Irregular
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What is a Spectroscope
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an instrument that separates white light into its various color components.
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Explain the Red Shift
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Stars tend to emit red light if they are moving away. Scientist determined that every galaxy studied seemed to be emitting red light, thus moving away from the earth. They concluded the universe must be expanding.
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Explain the Big Bang Theory
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all the matter and energy was concentrated into a single place and about 15 to 20 billion years ago an explosion occurred sending matter and energy out. The energy is known as background radiation. The force of gravity began to grow in between the matter causing it to form clumps of matter, later becoming galaxies.
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Explain the difference between an open and closed universe
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An open universe is a theory that the universe will continue to expand, but the stars will eventually die off and lead to total emptiness; while a closed universe says gravitational pull between galaxies will one day slow down the outward movement. Eventually a blue shift will occur and the universe will move back towards the center leading to another big-bang.
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What is a Quasar
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- Most distant objects in the universe, thought to be about 12 billion light years from Earth. They give off radio and x-rays. They give off a large amount of energy greater than most galaxies
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Size of stars largest to smallest
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Supergiant, red giant, medium, white dwarf, and nuetron star
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Most found elements
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Hydrogen and Helium
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What is nuclear fusion
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process that occurs within stars in which atoms of hydrogen gas are fused together to form atoms some is released as heat and light.
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Layers of Sun
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Corona, Chromosphere, Photosphere, core
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Prominces
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– violent storm on sun originating from the chromo-sphere, large loops of hot gases erupt and fall back to the sun
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Solar flare
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bright burst of light lasting less than an hour
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Solar Wind
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continuous stream of high energy particles released from the sun. Sometimes interfere with radio signals
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Sunspots
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cool, dark spots on sun, storms occurring in lower atmosphere. A cycle of spots occurring every 10-11 years. The sun rotates on its axis, with the gases at the center rotating every 25 days
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Colors hottest to coldest
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Blue, white, yellow, orange, red
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Pulsar
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when a nuetron star begins to rotate
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Life of medium star
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nebula, protostar, red giant, white dwarf, black dwarf
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Life of High mass star
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nebula, protostar, rediant, supernova, nuetron star
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Life of Super massive star
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nebula, protostar, supergiant, supernova, blackhole
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