A speeding bullet

What Is Supersonic Flight?

Some aircraft fly faster than a speeding bullet.

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Artist's concept of Mariner 9, the first probe to orbit Mars

What Is a Space Probe?

Learn about spacecraft that travel through space to collect science information.

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Astronaut Sunita Williams behind Robonaut 2 on the space station

'Station Talks With Elementary School' Video

Watch astronaut Sunita Williams talk to students at Wickliffe Progressive Community School.

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