Space (2)

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Across
  1. 2. everything that exists; all matter and energy; also includes all of space and time.
  2. 4. sometimes called Earth’s “sister planet.”
  3. 8. an object, either natural or human made, that orbits a larger object.
  4. 9. dark, solid, flat areas of lava
  5. 10. holds our planet together
  6. 11. an imaginary line that runs from the North Pole to South Pole through the center of Earth.
Down
  1. 1. has a very short year, orbiting the Sun in just 88 Earth days
  2. 3. aka terrestrial planets
  3. 5. the four large, gaseous planets - Jupiter, Saturn, Uranus, and Neptune - located beyond the asteroid belt in our solar system.
  4. 6. made of dust and other small particles
  5. 7. scientists who study the universe beyond Earth, such as the universe, galaxies, and stars.