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doit_the_clown doit_the_clown
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7 years ago
What is the probable composition of both Pluto and its satellite, Charon, based on their average densities?
A)   About half rock and half ice
B)   Rock with perhaps a 100-km-thick ice mantle
C)   Mostly ice, with perhaps a small rocky core
D)   Liquid hydrogen, with a small rocky core and a gaseous atmosphere
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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papachulopapachulo
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7 years ago
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doit_the_clown Author
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7 years ago
Good timing, thanks!
Katey_maree
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Yesterday
This calls for a celebration Person Raising Both Hands in Celebration
mkyoungs
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2 hours ago
this is exactly what I needed
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