The Planets - Kyrene School District

11. Outer Planets _____ – Fifth planet from the sun and the largest in our solar system. Atmosphere mainly consists of hydrogen and helium. Surface is suspected to be composed of liquid hydrogen and helium, and may have solid core at the center. It is an average of 484 million miles from the sun and 11.8 years to complete one orbit. Has 16 ... ................
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