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I honestly don't know for sure what Sedna was made out of. I know that dwarf planets are normally made out of rocky and maybe some icy things too. And as you know, Sedna is a dwarf planet. Iv'e always wondered. Maybe you could look up Sedna off of Wikipedia or you can watch on YouTube "the mystery of Sedna." I love space.

Hope this helps!

~Emily

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13y ago

What else can I help you with?