Neptune and Uranus

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Across
  1. 1. seventh planet from the sun and the third largest planet in our solar system
  2. 4. angle between a planet's rotation axis and its orbital plane
  3. 6. gas that causes Uranus and Neptune to appear blue
  4. 7. Radiation ________ is the effect of chemical reactions that result when high-energy particles strike the icy surfaces of objects in the outer solar system
  5. 8. the name of Neptune's largest moon
Down
  1. 2. Farthest planet from the sun and is an ice giant with a thick windy atmosphere
  2. 3. Prominent storm system in the atmosphere of Neptune observed by Voyager 2, near the equator of the planet
  3. 5. giant planets made up of heavier elements like carbon, nitrogen, oxygen, and sulfur.