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What is a Blue Moon?

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Is the Moon moving away from the Earth?

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Will the planets align in 2012?

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Meteor hunters: Leonids on show!

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What happens when a star goes supernova?

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Why is water on the Moon such a big deal?

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Why does Uranus rotate on its side? (And why does Venus rotate backwards?)

2 comments
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What is the Oort Cloud?

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How far away is space?

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What is a light year?

3 comments
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What are shepherd moons?

2 comments
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What does "Roche limit" (or "Roche radius") mean?

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International Year of Astronomy 2009

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How are Planetary Rings Formed?

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Meteor hunters: Orionids on show!

4 comments

What will happen to the Earth when the Sun dies?

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What could cause the human race to become extinct?

7 comments

2012 - The end of the world isn't nigh!

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Are some stars bigger than the Earth?

8 comments
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What causes meteor showers?

6 comments
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What is Redshift?

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What are the Northern Lights?

4 comments
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Is the world likely to end regarding astronomical changes in 2012?

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Where are the Voyager probes now, and are we still receiving information from them?

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