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Can I see details on Venus?
(Intermediate)
Can we hear sound on Titan?
(Intermediate)
Earth's Bow Shock
(Advanced)
How close does a supernova need to be to damage the Earth's environment?
(Intermediate)
How do solar flares affect airline pilots?
(Intermediate)
How does Venus have sulphuric acid in it's clouds?
(Beginner)
How long is twilight on the Moon?
(Beginner)
If the sun went out and our atmosphere froze solid, what color would it be?
(Intermediate)
Is it sensible to consider terraforming Mars?
(Beginner)
Is the green flash real?
(Beginner)
Is there oxygen in the atmospheres of other planets?
(Intermediate)
What are some of the effects of solar flares on Earth?
(Intermediate)
What are the advantages and disadvantages of using a telescope in space?
(Intermediate)
What are the atmospheres of Mars and Pluto like?
(Intermediate)
What color are meteors?
(Beginner)
What color is each planet?
(Intermediate)
What is the hottest time of day?
(Beginner)
What was different on Mars in the past to allow liquid water to be present?
(Intermediate)
Why are telescopes located in remote places?
(Intermediate)
Why are the Moon and Sun sometimes orange or red?
(Beginner)
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Why are telescopes located in remote places? (Intermediate)
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Is speed of light the same everywhere ? (Beginner)
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Earth's Bow Shock (Advanced)
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Why is the sun red? During sunset, Northeastern US, Summer 2021 (Beginner)
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But seriously: what was there before the Big Bang? (Beginner)
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How likely is it that the Solar System has had or will have a close encounter with another star? (Intermediate)
How do we know what we observe is x light years away? (Beginner)
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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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Why is looking out into space the same as looking back in time? (Beginner)
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How far is each planet from Earth? (Intermediate)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
How does the position of Moonrise and Moonset change? (Intermediate)
Which planet is most similar to Earth? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
What would happen if the Moon fell out of its orbit around Earth? (Intermediate)
Why is the moon in a different place every night? (Beginner)
Earth's Bow Shock (Advanced)
Is it possible for amateurs to do optical interferometry? (Intermediate)
How does night and day work? (Beginner)
What was the bright, smoothly moving star that I saw? (Beginner)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
How far is each planet from Earth? (Intermediate)
What kind of eyepieces do I need to look at planets? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
What would happen if the Moon fell out of its orbit around Earth? (Intermediate)
Which planet is most similar to Earth? (Intermediate)
Earth's Bow Shock (Advanced)
At what speed does the Earth move around the Sun? (Beginner)
What is the difference between a "star" and a "sun"? (Beginner)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
How are light and heavy elements formed? (Advanced)
How far is each planet from Earth? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
Which planet is most similar to Earth? (Intermediate)
What was the bright, smoothly moving star that I saw? (Beginner)
Why is the moon in a different place every night? (Beginner)
What would happen if the Moon fell out of its orbit around Earth? (Intermediate)
Earth's Bow Shock (Advanced)
How does the position of Moonrise and Moonset change? (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)
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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Our Solar System
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Timekeeping
SETI & Extraterrestrial Life
Physics
General Physics
The Theory of Relativity
People & Astronomy
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Space Exploration & Astronauts
The History of Astronomy
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