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Could a planetary system survive if its star merged with another, or if its star went supernova?
(Intermediate)
Could you tell me about the life cycle of galaxies?
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How are galaxies formed?
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How do galaxies collide in an expanding universe?
(Intermediate)
How do we know what parameters to use when simulating the collision of the Milky Way and Andromeda?
(Advanced)
Is the Milky Way a collision of two galaxies?
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(Intermediate)
Is time travel possible using merging black holes?
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What happens when an antimatter black hole collides with a matter blackhole?
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What happens when galaxies collide?
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What happens when two black holes get too close?
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What is the largest galaxy?
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What will happen to the Milky Way in the future?
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What would happen if there was a collision between two white dwarfs?
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What would happen if two stars collided?
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Why are astronomers interested in gravitational waves?
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How do we know the age of the Universe and the Earth? (Intermediate)
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Do galaxies that are receding from us faster than the speed of light disappear from our observations? (Intermediate)
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Can two galaxies move away from each other faster than the speed of light? (Intermediate)
What is a graviton? (Intermediate)
Why are there high tides during a Full Moon? (Intermediate)
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Have the inner planets cleared their neighborhood? (Intermediate)
What caused the Big Bang and created the Universe? (Beginner)
If spacetime is curved, is it possible for us to look into space and see light from Earth from long ago? (Intermediate)
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What should I know about the upcoming Solar Eclipse? (2017)
What is the universe expanding into? (Intermediate)
What do I need to do to become an astronomer? (Beginner)
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Why is looking out into space the same as looking back in time? (Beginner)
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How are light and heavy elements formed? (Advanced)
What color is each planet? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
How far is each planet from Earth? (Intermediate)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
How are elements heavier than iron formed? (Intermediate)
Why do airplanes take longer to fly West than East? (Intermediate)
What is the difference between a "star" and a "sun"? (Beginner)
Can artificial gravity be created in space? (Intermediate)
How are light and heavy elements formed? (Advanced)
What color is each planet? (Intermediate)
Can artificial gravity be created in space? (Intermediate)
Why do airplanes take longer to fly West than East? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
How far is each planet from Earth? (Intermediate)
What is the difference between a "star" and a "sun"? (Beginner)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
Why can't a plane fly slowly and let the Earth pass underneath? (Beginner)
How do you measure the distance between Earth and the Sun? (Intermediate)
How are light and heavy elements formed? (Advanced)
What color is each planet? (Intermediate)
Can artificial gravity be created in space? (Intermediate)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
How far is each planet from Earth? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
What is the difference between a "star" and a "sun"? (Beginner)
Why do airplanes take longer to fly West than East? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
Why do the planets orbit the sun? (Beginner)
What's going to happen on December 21st 2012? (Intermediate)
What color is each planet? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
How far is each planet from Earth? (Intermediate)
Is the Moon moving away from the Earth? When was this discovered? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
Why do the planets orbit the sun? (Beginner)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
How long does it take for the Sun's light to reach us? (Beginner)
When was the last time all of the planets were aligned? (Beginner)
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