this post was submitted on 18 Oct 2024
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Someone's lying (lemmy.world)
submitted 4 weeks ago by [email protected] to c/[email protected]
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[–] [email protected] 21 points 4 weeks ago (15 children)

Where did you learn that? Is that a real thing people are taught?

[–] [email protected] 4 points 4 weeks ago (2 children)

Just googled it now, and I'm seeing the "3 miles" number thrown around a lot.

https://science.howstuffworks.com/question198.htm

[–] [email protected] 6 points 4 weeks ago* (last edited 4 weeks ago) (1 children)

That's just weird. The question is about the eye. And the primary "answer" they give is about the geometry of our planet.

Edit: At least the real answer is somewhere further down in the text:

Theoretically, in a vacuum there's no limit to how far away your eyes could see since light rays can travel an infinite distance, McCulley says.

[–] [email protected] 4 points 4 weeks ago

Light emitted farther than 46 billion light years away will never reach you. While traveling an infinite distance the universe expands faster, and light emitted not that far will get so red-shifted that it won't be visible anymore.

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