Space vocabulary quiz

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Across
  1. 3. the star around which the planets revolve from which they receive heat and light
  2. 5. the very hot very dense center of our planet
  3. 6. a celestial body that is in orbit around the Sun
  4. 7. a large planet mostly composed of helium and/or hydrogen
  5. 9. the outer part of a planet
Down
  1. 1. the mostly solid bulk of Earth's interior
  2. 2. a planet that is composed primarily of silicate rocks or metals
  3. 4. an object that orbits a planet or another celestial body that is not a star
  4. 8. huge celestial bodies made of hydrogen and helium that produce light and heat from the
  5. 10. a group of planets and other bodies that revolve around a star