• db2@lemmy.one
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    1 year ago

    It’s only light to us because we see it. Lots of other things put out radiation we can’t look at directly.

  • 018118055
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    1 year ago

    It’s maybe counterintuitive, but around 8/9 of normal matter is in interstellar and intergalactic space.

    Source: I remembered it and searched for it just now.