Space adventure

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Across
  1. 2. - Extraterrestrial being from another planet.
  2. 5. - A group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure.
  3. 7. - The path followed by a celestial body around another in space.
  4. 10. - A person trained to travel and work in space.
Down
  1. 1. - A garment designed to protect astronauts from the vacuum and radiation of space.
  2. 3. - Relating to the moon.
  3. 4. - A spacecraft propelled by engines that burn fuel.
  4. 6. - A cloud of gas and dust in space where stars are born.
  5. 8. - A vast system of stars, gas, and dust held together by gravitational forces.
  6. 9. - A celestial object consisting of a nucleus of ice and dust that becomes luminous as it approaches the sun.