SOL 6.3 - Space

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Across
  1. 4. The name given to the four inner planets: Mercury, Venus, Earth, and Mars.
  2. 7. a description of the solar system in which all of the planets revolve around the sun.
  3. 8. A system of millions or billions of stars held together.
  4. 12. Objects that revolve around the sun that are too small and too numerous to be considered planets
  5. 13. A chunk of rock or dust in space.
  6. 14. A ball of rock and ice who's orbit is usually a long, narrow ellipse
  7. 15. A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.
  8. 17. Any object that revolves around another object in space.
Down
  1. 1. The study of the moon, stars, and other objects in space
  2. 2. The attractive force between two objects; its magnitude depends on their masses and the distance between them.
  3. 3. A description of the solar system in which all of the planets revolve around Earth.
  4. 5. The combining of two atomic nuclei onto a single larger nucleus, as when two hydrogen atoms join together to for helium.
  5. 6. The name given to the first four Jupiter, Saturn, Uranus, and Neptune
  6. 9. a region of the solar system between the orbits of Mars and Jupiter, where many asteroids are found
  7. 10. a scientist who studies the universe beyond earth
  8. 11. A meteoroid that has hit Earth's surface.
  9. 16. The path of an object as it revolves around another planet.