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Ask an Astronomer
Real NASA astronomers answer questions about the exciting science of astronomy.

"How do you discover an asteroid?" (Ask

Dr. Bidushi Bhattacharya helps us understand ...

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: 13-Feb-2008

"Why aren't there any green stars?" (Ask

Dr. Michelle Thaller answers this question fo...

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: 13-Mar-2008

"Can a galaxy die?" (Ask an Astronomer)

Dr. Varoujan Gorjian gives us the answer to t...

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: 10-Apr-2008

"Can a galaxy die?" (Ask an Astronomer)

Dr. Varoujan Gorjian gives us the answer to t...

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: 10-Apr-2008

"Can a planet have two suns?" (Ask an As

Dr. Carolyn Brinkworth addresses a famous sci...

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: 08-May-2008

"Can a planet have two suns?" (Ask an As

Dr. Carolyn Brinkworth addresses a famous sci...

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: 08-May-2008

Spitzer Turns Five (Ask an Astronomer Sp

This 'Ask an Astronomer' special looks at som...

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: 25-Aug-2008

What's Between the Stars? (Ask an Astron

In this 'Ask an Astronomer' episode, Dr. Mich...

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: 23-Oct-2008

What's Between the Stars? (Ask an Astron

In this 'Ask an Astronomer' episode, Dr. Mich...

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: 23-Oct-2008

Why Is the Sky Blue? (Ask an Astronomer)

In this 'Ask an Astronomer' episode, Dr. Caro...

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: 22-Dec-2008

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