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Astronomy 2
Question | Answer |
---|---|
What is the Big Bang Theory? | Is the most widely accepted theory for how the universe formed. |
What is the Solar Nebular Theory? | Is the most widely accepted theory on how solar system and stars form. |
What is the Solar Nebula? | Huge, vast clouds of ice, gas, and dust. |
What are Galaxies? | Collections of billions of stars |
What are Black holes? | The end of the life cycle of some supergiant stars. |
What is a Light-Year? | The distance light travels in one year. |
What is the Hertzsprung- Russell (H-R) diagram? | Shows the relationship between absolute magnitude (brightness) in relation to their surface temperatures. |
What is the less massive stars order? | 1. Nebula, 2. Protostar, 3. Main sequence star(born), 4. White dwarf, 5. Black dwarf(death) |
What is the more massive stars order? | 1. Nebula, 2. Protostar, 3. Main sequence star (born), 4. Supernova, 5. Neutron star(death) |
What is the evidence that the universe is expanding? | Doppler Shift toward the red end of the spectrum. |