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Can any galaxies be seen with the naked eye?
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Is the Local Group expanding along with the entire Universe?
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What what a black hole merger look like from a telescope? (Advanced)
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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)
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What is the universe expanding into? (Intermediate)
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What what a black hole merger look like from a telescope? (Advanced)
How much money is spent on space exploration? (Intermediate)
How can I find the distance to the Sun on any given day? (Advanced)
Is the Earth at the centre of the Universe? (Intermediate)
How does the position of Moonrise and Moonset change? (Intermediate)
Is the universe expanding faster than the speed of light? (Intermediate)
Why does the Earth have only one moon? (Intermediate)
Can planets collide with one another? (Intermediate)
Why do people draw stars with five points? (Intermediate)
What happens to the helium formed in the Sun? (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)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
At what speed does the Earth move around the Sun? (Beginner)
How does the position of Moonrise and Moonset change? (Intermediate)
How does the location of sunrise and sunset change throughout the year? (Advanced)
What is that ring (or rainbow) around the moon? (Beginner)
If gravity isn't a force, how does it accelerate objects? (Advanced)
Can artificial gravity be created in space? (Intermediate)
If gravity isn't a force, how does it accelerate objects? (Advanced)
How do you measure the distance between Earth and the Sun? (Intermediate)
Why do the planets orbit the sun? (Beginner)
What is the difference between a "star" and a "sun"? (Beginner)
At what speed does the Earth move around the Sun? (Beginner)
Can artificial gravity be created in space? (Intermediate)
Which planet is most similar to Earth? (Intermediate)
How do we know the Milky Way is a spiral galaxy? (Intermediate)
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'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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