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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 do I polar align my telescope? (Beginner)
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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)
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)
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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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If the universe is 13.8 billion years old, how can it be larger than 13.8 billion light years across? (Advanced)
Why can't you see stars during the day? (Beginner)
What caused the Big Bang and created the Universe? (Beginner)
What do astronauts do all day in the International Space Station? (Intermediate)
What are RA and DEC? (Intermediate)
Can we find the place where the Big Bang happened? (Intermediate)
What happens when galaxies collide? (Beginner)
Why is the time between two successive full moons different from the lunar synodic month? (Advanced)
Is the Moon always visible during winter on the North Pole? (Intermediate)
How do we know what other planets (and stars, galaxies, etc.) are made of? (Intermediate)
What color is each planet? (Intermediate)
What is that ring (or rainbow) around the moon? (Beginner)
How does the position of Moonrise and Moonset change? (Intermediate)
What is the difference between a "star" and a "sun"? (Beginner)
When was the last time all of the planets were aligned? (Beginner)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
What direction do planets rotate? (Beginner)
Can artificial gravity be created in space? (Intermediate)
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)
What color is each planet? (Intermediate)
What is that ring (or rainbow) around the moon? (Beginner)
How does the position of Moonrise and Moonset change? (Intermediate)
What is the difference between a "star" and a "sun"? (Beginner)
When was the last time all of the planets were aligned? (Beginner)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
What direction do planets rotate? (Beginner)
Can artificial gravity be created in space? (Intermediate)
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)
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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