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Review #2 Stack 5
Astronomy (Stars and Universe) ES.13a, b
Question | Answer |
---|---|
What is the most widely accepted theory for how the universe was formed? | The Big Bang theory |
What is the most widely accepted theory on how the solar system and stars form? | The Solar Nebular theory |
How do all stars start? | A solar nebula that collapses |
What is a Solar Nebula? | A huge, vast clouds of ice, gas and dust |
What is the order of the less massive stars? | 1. Nebula 2. Protostar 3. Main sequence star 4. White dwarf 5. Black dwarf |
What is the order of the more massive stars? | 1. Nebula 2. Protostar 3. Main sequence star 4. Supernova 5. Neutron star |
Who created the Hertzsprung? | Russell (H-R) |
What type of star puts out about 10,000 times as much energy as the sun? | Blue giant stars |
What are galaxies? | Collections of billions of stars |
What are black holes? | The end of the life cycle of some supergiant stars |
How far away is the nearest star? | 24 trillion miles away |
How long would it take to get to a star 24 trillion miles away at 38,000 mph? | 166 million years |
What is a light-year? | The distance light travels in one year |
What is the most common unit used in astronomy? | A light-year |