Space Exploration

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Across
  1. 3. - Touchdown of a spacecraft on a celestial body
  2. 5. - Extravehicular activity performed by an astronaut outside a spacecraft
  3. 7. - International Space Station, a habitable space station in low Earth orbit
  4. 10. - Interstellar cloud of dust, hydrogen, helium, and other ionized gases
  5. 11. - NASA's human spaceflight program that landed astronauts on the Moon
  6. 12. - Vast system of stars, gas, and dust held together by gravity
  7. 14. - Russian astronaut
  8. 19. - Act of traveling through space to discover and learn about new worlds
  9. 20. - Vehicle designed for travel or operation in outer space
Down
  1. 1. - Celestial body that orbits a star and is not a moon
  2. 2. - Journey or task undertaken by a spacecraft or astronauts
  3. 4. - Artificial object placed in orbit around a celestial body
  4. 6. - Relating to the Moon
  5. 8. - Act of sending a spacecraft into space
  6. 9. - Fourth planet from the Sun and a target for human exploration
  7. 13. - Person trained to travel and work in space
  8. 15. - Rocky object that orbits the Sun, mostly found in the asteroid belt
  9. 16. - Remote-controlled vehicle used for exploring the surface of other planets
  10. 17. - Instrument used to observe distant objects in space
  11. 18. - Path followed by a spacecraft around a celestial body