Spyke

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

12

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.

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Of all the forms that matter can take in this universe, it predominantly forms into big orbs of light in an otherwise endless sea of darkness | Spyke