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astronomy 2
Question | Answer |
---|---|
what is the big bang theory | Big Bang theory is most widely accepted theory for how universe formed. Doppler Shift toward the red end of the spectrum is evidence that the universe is expanding. |
what is the solar nebula? | Solar Nebula is huge, vast clouds of ice, gas and dust |
less massive stars order? | 1. Nebula, 2. protostar, 3 main sequence star (born), 4. white dwarf, 5. black dwarf (death) |
more massive stars order? | Nebula, 2. protostar, 3 main sequence star (born), 4. supernova, 5. neutron star (death |
what is a galaxy? | Galaxies are collections of billions of stars |
what are black holes? | Black holes are the end of the life cycle of some supergiant stars. |
what is a light year? | Light-Year is the distance light travels in one year. It is the most common unit if measurement used in astronomy. |
what does the hertzsprung-russell diagram show? | the relationship between absolute magnitude (brightness) in relation to their surface temperatures. |