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Milky Way
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Are names given to black holes?
(Advanced)
Are the planes of solar systems aligned with the plane of the Galaxy?
(Intermediate)
Can any galaxies be seen with the naked eye?
(Beginner)
Can we look back in time and see our galaxy forming?
(Intermediate)
Can we make a movie of the Milky Way galaxy's rotation?
(Beginner)
Considering the motion of the Earth, the solar system, and the galaxy, how fast am I moving while lying in bed asleep?
(Intermediate)
Could there be life in the galaxies nearest to the Milky Way?
(Intermediate)
Could you tell me about the life cycle of galaxies?
(Intermediate)
Does the Milky Way spin counter-clockwise? If so, do all spiral galaxies spin in this direction and why?
(Beginner)
Does the Sun move around the Milky Way?
(Intermediate)
Has anyone made a map of the Milky Way?
(Beginner)
How can we estimate the number of Earth-like planets in the Galaxy?
(Intermediate)
How can we find galaxies behind the Milky Way?
(Intermediate)
How can we know that there are other galaxies if we cannot leave ours?
(Beginner)
How can we see the Milky Way if we are inside it?
(Intermediate)
How do galaxies collide in an expanding universe?
(Intermediate)
How do stars move in the Galaxy?
(Intermediate)
How do we know the Milky Way is a spiral galaxy?
(Intermediate)
How do we know what parameters to use when simulating the collision of the Milky Way and Andromeda?
(Advanced)
How long has humanity known that we live in a galaxy similar to others in the Universe?
(Intermediate)
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Why is the sun red? During sunset, Northeastern US, Summer 2021 (Beginner)
Why do rays from Sun appear to converge at a point? (Beginner)
But seriously: what was there before the Big Bang? (Beginner)
How far can photons move freely in the early universe (Advanced)
How likely is it that the Solar System has had or will have a close encounter with another star? (Intermediate)
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What is the universe expanding into? (Intermediate)
What do I need to do to become an astronomer? (Beginner)
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What was the bright, smoothly moving star that I saw? (Beginner)
What is the size of the Solar System? (Intermediate)
What is the best way to see the Milky Way? (Intermediate)
How can the universe be "flat"? We're 3D! (Beginner)
Why do planets not twinkle? (Intermediate)
Why do the planets orbit the sun? (Beginner)
Why do all the planets orbit in the same plane? (Intermediate)
What is sidereal time? (Beginner)
What type of energy does a black hole have? (Intermediate)
Which planet is most similar to Earth? (Intermediate)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
How far is each planet from Earth? (Intermediate)
What was the bright, smoothly moving star that I saw? (Beginner)
Earth's Bow Shock (Advanced)
What would happen if the Moon fell out of its orbit around Earth? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
Why do the planets orbit the sun? (Beginner)
Which planet is most similar to Earth? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
How are light and heavy elements formed? (Advanced)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
How are light and heavy elements formed? (Advanced)
Which planet is most similar to Earth? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
What was the bright, smoothly moving star that I saw? (Beginner)
How far is each planet from Earth? (Intermediate)
Why is the moon in a different place every night? (Beginner)
How does the position of Moonrise and Moonset change? (Intermediate)
What would happen if the Moon fell out of its orbit around Earth? (Intermediate)
Earth's Bow Shock (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)
How do you measure the distance between Earth and the Sun? (Intermediate)
Is the Moon moving away from the Earth? When was this discovered? (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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The Milky Way
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SETI & Extraterrestrial Life
Physics
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The Theory of Relativity
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