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4
|
The collection of information about earth and other objects without being in direct contact.
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5
|
Weightlessness.
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6
|
A spacecraft that can carry a cerw into space, return to Earth, and then be reused for the same purpose.
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9
|
The velocity a rocket must reach to fly beyond a planet's gravitational pull.
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10
|
An item that has use on Earth but was originally developed for space.
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11
|
A large artificial satellite on which people can live and work for long periods.
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1
|
A spacecraft that carries scientific insterments that can collect data, but has no human crew.
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2
|
A place that is empty of all matter.
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3
|
The velocity a rocket must achieve to establish an orbit around Earth.
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7
|
A device that expels gas in one direction to move it in the opposite direction.
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8
|
An object that revolves around another object in space.
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