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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?
(Beginner)
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?
(Intermediate)
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How long would it take the Earth to fall into the Sun? (Intermediate)
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If I were hypothetically wearing a spacesuit and sitting on one of the Voyager space probes at their current positions in space, how much light would I have? (Intermediate)
What makes certain lunar eclipses so special? (Beginner)
Why is Earth's core molten? (Intermediate)
What will happen to Earth's tides as the moon moves away from us? (Intermediate)
How can spiral galaxies keep their shape? (Advanced)
Does a black hole have a "surface"? (Intermediate)
How can you link telescopes to make a bigger "effective telescope"? (Intermediate)
What should I know about the upcoming Solar Eclipse (2017)? (Beginner)
Do galaxies that are receding from us faster than the speed of light disappear from our observations? (Intermediate)
Why are astronomers interested in gravitational waves? (Intermediate)
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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)
Can we find the place where the Big Bang happened? (Intermediate)
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Why are there both high and low tides? (Intermediate)
What are the names of the earth, moon, sun, and solar system? (Beginner)
Why is twilight short near the equator? (Intermediate)
What's going to happen on December 21st 2012? (Intermediate)
How does night and day work? (Beginner)
What color is each planet? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
How do we know the age of the Universe and the Earth? (Intermediate)
Why do the planets orbit the sun? (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)
At what speed does the Earth move around the Sun? (Beginner)
Why do the planets orbit the sun? (Beginner)
How far is each planet from Earth? (Intermediate)
Why are the Moon and Sun sometimes orange or red? (Beginner)
What are the names of the earth, moon, sun, and solar system? (Beginner)
How do you measure the distance between Earth and the Sun? (Intermediate)
Why do stars twinkle? (Beginner)
What are the requirements for being a planet? (Beginner)
What color is each planet? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
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)
Why do the planets orbit the sun? (Beginner)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
How do you measure the distance between Earth and the Sun? (Intermediate)
What would happen if an asteroid 10 kilometers across hit the Earth? (Beginner)
Why do stars twinkle? (Beginner)
What is the difference between a "star" and a "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)
When was the last time all of the planets were aligned? (Beginner)
How long does it take for the Sun's light to reach us? (Beginner)
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