Space

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Across
  1. 2. The red planet, fourth from the Sun.
  2. 4. The angle of the Earth’s axis that causes seasons.
  3. 5. The closest planet to the Sun.
  4. 7. The time it takes for the Earth to rotate once on its axis.
  5. 8. The hottest planet in the Solar System.
  6. 10. Our home planet, the third from the Sun.
  7. 12. The largest planet in the Solar System.
  8. 13. The Sun and all the objects that orbit it.
  9. 19. The value that shows how strong gravity is at a location.
  10. 20. The force of gravity acting on an object’s mass.
Down
  1. 1. The amount of matter in an object, not affected by gravity.
  2. 3. The planet famous for its rings.
  3. 5. The natural satellite that orbits the Earth.
  4. 6. The time it takes for the Earth to orbit the Sun once.
  5. 9. The shape of the Earth.
  6. 11. The yearly cycle of weather changes caused by the tilt of the Earth.
  7. 14. The curved path of a planet or moon around a star or planet.
  8. 15. A luminous sphere of gas, like the Sun.
  9. 16. The force that pulls objects toward each other.
  10. 17. A huge collection of stars, gas, and dust bound together by gravity.
  11. 18. All of space and everything in it, including galaxies.