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

W-5 Star-Forming Region (What Is It?)

Visit the W-5 star-forming region with 'Ask a...

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: 05-Feb-2009

Where Is the Center of the Universe? (As

Dr. Varoujan Gorjian explains the mind-boggli...

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: 26-Aug-2009

Why Doesn't the Moon Fall Down?

This 'Ask an Astronomer' episode explains how...

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: 13-Oct-2005

Are Other Solar Systems Like Our Own?

Solar systems come in a large variety of flav...

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: 13-Oct-2005

Why Does the Moon Look Like It Changes?

Phases of the Moon are clearly explained in t...

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: 13-Oct-2005

Do Other Solar Systems Exist?

'Ask an Astronomer' explains how we detect pl...

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: 13-Oct-2005

Why Are Solar Eclipses Only Visible in S

This 'Ask an Astronomer' episode explains ecl...

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: 13-Oct-2005

What Is a Brown Dwarf?

'Ask an Astronomer' explains one of the stran...

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: 13-Oct-2005

How Do Stars Live and Die?

'Ask an Astronomer' tackles stellar evolution...

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: 13-Oct-2005

Can You Feel a Solar Wind?

This 'Ask an Astronomer' segment attempts to ...

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: 13-Oct-2005

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