Space Exploration: Pushing the Boundaries of Discovery

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Across
  1. 4. - Related to the study of celestial objects and phenomena (12)
  2. 6. - Relating to life or objects originating outside Earth (15)
  3. 7. - Astronaut of the Russian space program (9)
  4. 10. - Touchdown of spacecraft on the surface of the moon (11)
  5. 11. - Space-based observatory that captures stunning images (14)
Down
  1. 1. - Pertaining to or occurring between stars (11)
  2. 2. - First artificial satellite launched into space (7) Voyager - Spacecraft mission that explored the outer solar system (7)
  3. 3. - Private space company founded by Elon Musk (6)
  4. 5. - Habitable space laboratory in Earth's orbit (21)
  5. 8. - Unmanned spacecraft sent to gather data in space (6)
  6. 9. - Robotic vehicle sent to explore the surface of Mars (8)