Space Explorers

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Across
  1. 1. The United States government agency responsible for space exploration.
  2. 4. The force that pulls objects towards each other, especially towards the Earth.
  3. 5. A tool used to observe distant objects in space.
  4. 8. A vehicle that propels astronauts and equipment into space.
Down
  1. 2. The special clothing astronauts wear to stay safe in space.
  2. 3. A man-made object that orbits a planet, used for communication and observation.
  3. 6. The path an object takes as it moves around a planet or star.
  4. 7. The act of walking on the surface of the Moon.