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Can any galaxies be seen with the naked eye?
(Beginner)
Could there be life in the galaxies nearest to the Milky Way?
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Could you tell me about the life cycle of galaxies?
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Do we really observe the edges of galaxies at different epochs?
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Does the Sun move around the Milky Way?
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How do galaxies collide in an expanding universe?
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How do we know what parameters to use when simulating the collision of the Milky Way and Andromeda?
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If I were traveling through space, could I see distant galaxies with my own eyes?
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Is Andromeda part of the Milky Way? Where can I find them in the sky?
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Is the Local Group expanding along with the entire Universe?
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Is the Milky Way a collision of two galaxies?
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What will happen to the Milky Way in the future?
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Why are there blue shifted galaxies?
(Intermediate)
Will the diameter of a cluster of galaxies change with redshift?
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What should I know about the upcoming Solar Eclipse? (2017)
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Why do we not have eclipses every month? (Beginner)
When was the last time all of the planets were aligned? (Beginner)
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Are there eclipses on other planets? (Intermediate)
Is the Moon moving away from the Earth? When was this discovered? (Intermediate)
What is the difference between a "star" and a "sun"? (Beginner)
At what speed does the Earth move around the Sun? (Beginner)
Are meteorites hot or cold when they hit Earth? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
What color is each planet? (Intermediate)
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When was the last time all of the planets were aligned? (Beginner)
Is the Moon moving away from the Earth? When was this discovered? (Intermediate)
How long does a solar eclipse last? (Beginner)
What color is each planet? (Intermediate)
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At what speed does the Earth move around the Sun? (Beginner)
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What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
What color is each planet? (Intermediate)
When was the last time all of the planets were aligned? (Beginner)
Why are the Moon and Sun sometimes orange or red? (Beginner)
How do you measure the distance between Earth and the Sun? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
Is the Moon moving away from the Earth? When was this discovered? (Intermediate)
What is the difference between a "star" and a "sun"? (Beginner)
Why do we not have eclipses every month? (Beginner)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
Why do airplanes take longer to fly West than East? (Intermediate)
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)
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