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astronomy 2
Question | Answer |
---|---|
what is the big bang theory | most widely accepted theory for how universe formed. |
what is the solar nebular theory | most widely accepted theory on how solar system and stars form. |
what is a solar nebula | huge, vast clouds of ice, gas and dust |
what is the less massive star order | nebula, protostar, main sequence star, white dwarf, black drawf |
what are galaxies | collections of billions of stars |
what are black holes | the end of the life cycle of some supergiant stars |
where are black holes | in the middle of galaxies |
what is a light year | the distance light travels in one year. It is the most common unit if measurement used in astronomy. |
what are the distances in our universe measured in | light years |
how much energy does blue giant stars put out | about 10,000 times as much energy as the sun |