Space Exploration

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Across
  1. 3. A massive system of stars, planets, and other celestial objects bound by gravity.
  2. 6. The act of investigating unknown regions, including space.
  3. 7. The NASA program that landed humans on the Moon.
  4. 8. The red planet.
  5. 9. A small rocky body orbiting the Sun.
  6. 11. The U.S. government agency responsible for space exploration.
  7. 12. The first artificial satellite, launched by the Soviet Union.
  8. 14. A vehicle used to propel spacecraft into space.
Down
  1. 1. A Russian astronaut.
  2. 2. An artificial object placed in orbit around a planet.
  3. 4. The curved path of a celestial object around a star, planet, or moon.
  4. 5. Earth’s natural satellite.
  5. 7. A person trained to travel in a spacecraft.
  6. 10. An instrument used to observe distant objects in space.
  7. 13. The vast, seemingly infinite expanse beyond Earth’s atmosphere.