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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?
(Intermediate)
How are galaxies formed?
(Intermediate)
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?
(Beginner)
Is there a beginning and an end to a galaxy's life?
(Intermediate)
Is time travel possible using merging black holes?
(Intermediate)
What happens when an antimatter black hole collides with a matter blackhole?
(Intermediate)
What happens when galaxies collide?
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What happens when two black holes get too close?
(Intermediate)
What is the largest galaxy?
(Beginner)
What will happen to the Milky Way in the future?
(Beginner)
What would happen if there was a collision between two white dwarfs?
(Advanced)
What would happen if two stars collided?
(Intermediate)
Why are astronomers interested in gravitational waves?
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What is apparent magnitude? (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)
Why is Neptune still considered a planet when Pluto crosses its orbit? (Intermediate)
Could there be objects orbiting interior to Mercury? (Intermediate)
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)
What's the difference between astronomy and astrology? (Beginner)
Why is looking out into space the same as looking back in time? (Beginner)
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When was the last time all of the planets were aligned? (Beginner)
What color is each planet? (Intermediate)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
What is the difference between a "star" and a "sun"? (Beginner)
How do you measure the distance between Earth and the Sun? (Intermediate)
How does the location of sunrise and sunset change throughout the year? (Advanced)
Is the distance from the Earth to the Sun changing? (Advanced)
Why do airplanes take longer to fly West than East? (Intermediate)
What are the names of the earth, moon, sun, and solar system? (Beginner)
Why are the Moon and Sun sometimes orange or red? (Beginner)
What color is each planet? (Intermediate)
When was the last time all of the planets were aligned? (Beginner)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
What is the difference between a "star" and a "sun"? (Beginner)
How far is each planet from Earth? (Intermediate)
Why do airplanes take longer to fly West than East? (Intermediate)
How does the location of sunrise and sunset change throughout the year? (Advanced)
How does the position of Moonrise and Moonset change? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
Where did the name 'Earth' come from? (Beginner)
What color is each planet? (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)
When was the last time all of the planets were aligned? (Beginner)
What is the difference between a "star" and a "sun"? (Beginner)
Why do airplanes take longer to fly West than East? (Intermediate)
How does the location of sunrise and sunset change throughout the year? (Advanced)
Why are the Moon and Sun sometimes orange or red? (Beginner)
How do you measure the distance between Earth and the Sun? (Intermediate)
How are light and heavy elements formed? (Advanced)
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)
How long does it take for the Sun's light to reach us? (Beginner)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
What is the universe expanding into? (Intermediate)
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