Composition of Neptune
Name: Bob W Whitbeck
What is Neptune made of?
Neptune, like Jupiter, Saturn, and Uranus, is a so-called "gas giant"
planet. They are made of mostly hydrogen, methane, ammonia, and some
helium... when I was younger (much younger!) I found it amusing to invent
palindromes that contained the names of the planets: "Neptune? No, one
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Update: June 2012