Planets

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Across
  1. 1. the distance light travels in one year
  2. 3. invisible matter that makes up most of the universe
  3. 12. a small rocky object that orbits the sun
  4. 15. the point around a black hole where nothing can escape
  5. 17. a large, aging star that has expanded
  6. 18. everything that exists including all space, time, matter, and energy
  7. 20. a planet outside our solar system
  8. 22. a massive system of stars, gas, dust, and dark matter held together by gravity
  9. 23. a distant cloud of icy bodies surrounding the solar system
  10. 25. a space rock that burns in Earth’s atmosphere
Down
  1. 2. the force that pulls objects toward each other
  2. 4. a spinning disk of gas around a black hole or star
  3. 5. a star and all the objects that orbit it
  4. 6. BlackHole a region in space with gravity so strong that nothing can escape it
  5. 7. a small, dim star
  6. 8. a region beyond Neptune filled with icy objects
  7. 9. a meteor that reaches Earth’s surface
  8. 10. an icy object that forms a glowing tail near the sun
  9. 11. a large object that orbits a star and does not make its own light
  10. 13. a powerful explosion of a dying star
  11. 14. a small, dense remnant of a star
  12. 16. A cloud of dust and debris
  13. 19. an extremely dense star made mostly of neutrons after a supernova explosion
  14. 21. the path an object takes around another object
  15. 24. a group of stars forming a pattern