SPACE

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Across
  1. 3. / First dog in space
  2. 4. / First real image of this was captured in early 2019
  3. 7. MONS / Largest Martian mountain
  4. 8. / Massive explosion of dying star
  5. 11. / First man on the moon
  6. 13. / Only planet named for a Greek god
Down
  1. 1. / Program to land a man on the moon, named after this Greek god
  2. 2. / King of the Roman Gods
  3. 5. / Massive asteroid belt on the outskirts of the Solar System
  4. 6. / Of Jupiter’s four Galilean moons, the only one with little to no water or ice
  5. 9. / First man in space
  6. 10. MATTER / Accounts for 85% of the universe’s matter but has never been directly observed
  7. 12. / Space station’s name means “peace” or “world” in its operating country’s language