Earths Motion Through Space

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Across
  1. 2. An outdated, early model of the universe that incorrectly places a stationary Earth at the center.
  2. 5. System The collection of planets, dwarf planets, moons, and other space debris bound by gravity to orbit around a central star.
  3. 7. The spinning of a celestial body around its own internal axis.
  4. 9. The modern, accepted astronomical model that places the Sun at the center of the solar system.
  5. 10. The star at the heart of our solar system whose gravity holds everything together and provides light and heat.
Down
  1. 1. The imaginary, invisible line through the center of a planet or moon around which it spins.
  2. 3. Refers to an oval-shaped, flattened circle, which is the exact geometric path that planets take when orbiting the Sun.
  3. 4. A natural satellite that revolves in an orbit around a larger planet.
  4. 6. The complete journey of one celestial object traveling around another object along its orbital path.
  5. 8. The regular, curved path that an object takes as it travels around another object in space.