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Humans in Space TEST

Across
An item that has uses on Earth but was originally developed for use in space.
A place that is empty of all matter.
A satellite orbits Earth at the same rate as Earth rotates and thus stays over the same place on the earth all of the time.
The condition of experiencing weightlessness in orbit.
A large artificial satellite on which people can live and work for long periods.
A spacecraft that has various scientific instruments that can collect data, including visual images but has no human crew.
Down
A collection of information about Earth and other objects in space using satellites or probes.
A small robotic space probe that can move about the surface of a planet or moon.
A spacecraft that can carry a crew into space, return to Earth, and then be reused for same purpose.
An object that revolves around another object in space.