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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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Does evolution contradict the second law of thermodynamics? (Intermediate)
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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)
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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)
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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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What color is each planet? (Intermediate)
Can artificial gravity be created in space? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
How do you measure the distance between Earth and the Sun? (Intermediate)
Why do airplanes take longer to fly West than East? (Intermediate)
Why can't a plane fly slowly and let the Earth pass underneath? (Beginner)
How does the location of sunrise and sunset change throughout the year? (Advanced)
How are light and heavy elements formed? (Advanced)
When was the last time all of the planets were aligned? (Beginner)
Is the distance from the Earth to the Sun changing? (Advanced)
What color is each planet? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
Can artificial gravity be created in space? (Intermediate)
How are light and heavy elements formed? (Advanced)
Why do the planets orbit the sun? (Beginner)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
How do you measure the distance between Earth and the Sun? (Intermediate)
Why do airplanes take longer to fly West than East? (Intermediate)
How far is each planet from Earth? (Intermediate)
What is the universe expanding into? (Intermediate)
How are light and heavy elements formed? (Advanced)
What color is each planet? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
Can artificial gravity be created in space? (Intermediate)
Why do the planets orbit the sun? (Beginner)
How far is each planet from Earth? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
What is the difference between a "star" and a "sun"? (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)
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
Galaxies
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Timekeeping
SETI & Extraterrestrial Life
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