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Can they compose dark matter?

• deleted 6y ago
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• deleted 6y ago
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• hinkley 6y ago
  The matter we can see only accounts for ~4% of the 'stuff' that orbital mechanics says is there, and the other stuff doesn't interact with light (so no clouds) There would have to be 25 times as many rogue planets as the mass of all systems, and most of the mass in a system is in its sun, so 25 Earths, Jupiters and Saturns are barely a blip.
  • deepsun 6y ago
    4% of the 'stuff' is when we're considering dark energy, but I'm talking only about matter here (galaxy scale). There's still more than 5 times more dark matter than any matter we see, though. But I thought if it's extremely hard to detect rogue planets, then what if there's whole bunch of them, like really 6 times more than other matter including stars. And there's no clouds around them for some reason (example reason is that they were expelled from their formation clouds by gravitation dance with other planets there).