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If there are enough of these objects, is this where some of the missing matter of the universe is hiding? If so, what would the estimate be for how much?
After the Pluto debate a planet has a very specific definition. An object such as a brown dwarf or similar smaller object would not satisfy that definition. If it does not qualify as a star then a new classification would be required.
How would you distinguish between a 'failed star' and a 'rogue planet'? Would there be a significant difference in their compsition?
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