Stability of Planetary Orbits

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Across
  1. 4. A description of what could possibly happen.
  2. 6. Roman god of light, name of a planet in our solar system.
  3. 8. In order for Neptune to exist the planet would had to __________.
  4. 10. The cause to a lack of steadiness
Down
  1. 1. The addition of this component turns the Theory of Special Relativity to General Relativity.
  2. 2. One of two planets that may crash into the Earth according to simulations.
  3. 3. disaster
  4. 5. Tests that help support or debunk theories and scientific ideas.
  5. 7. This theory supports the idea of Accretion during our solar system's formation
  6. 8. The second smallest planet in the Solar System that may crash into the Earth in a few million years
  7. 9. The reason why Uranus and Neptune's positioning in our Solar System doesn't make sense