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Can I see details on Venus?
(Intermediate)
Can we hear sound on Titan?
(Intermediate)
How close does a supernova need to be to damage the Earth's environment?
(Intermediate)
How do solar flares affect airline pilots?
(Intermediate)
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)
Why can we see the sun's image before sunrise and after sunset?
(Beginner)
Why can't you see stars during the day?
(Beginner)
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Our universe is still expanding, does that mean things in our daily life are expanding? (Intermediate)
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What what a black hole merger look like from a telescope? (Advanced)
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Our universe is still expanding, does that mean things in our daily life are expanding? (Intermediate)
What was the bright, smoothly moving star that I saw? (Beginner)
What happened to the Arecibo Telescope? (Beginner)
Can I buy or name a star? (Beginner)
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)
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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 is Hot Dark Matter theory? (Intermediate)
What kind of eyepieces do I need to look at planets? (Intermediate)
How long does the supernova stage of a star last? (Intermediate)
How does the position of Moonrise and Moonset change? (Intermediate)
Why do planets rotate? (Intermediate)
What is a white hole? (Advanced)
How long could life on Earth survive if the Sun stopped shining? (Beginner)
Why do the planets orbit the sun? (Beginner)
What is the difference between a "star" and a "sun"? (Beginner)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
How do you measure the distance between Earth and the Sun? (Intermediate)
What is the difference between a "star" and a "sun"? (Beginner)
How long could life on Earth survive if the Sun stopped shining? (Beginner)
How does the position of Moonrise and Moonset change? (Intermediate)
Which planet is most similar to 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 are light and heavy elements formed? (Advanced)
At what speed does the Earth move around the Sun? (Beginner)
What color is each planet? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
What is the difference between a "star" and a "sun"? (Beginner)
How long could life on Earth survive if the Sun stopped shining? (Beginner)
Why do the planets orbit the sun? (Beginner)
How are light and heavy elements formed? (Advanced)
Which planet is most similar to Earth? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
How does the position of Moonrise and Moonset change? (Intermediate)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
What color is each planet? (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)
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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Our Solar System
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Cosmology & the Big Bang
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Physics
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The History of Astronomy
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