Comment on 8 Minutes

zea_64@lemmy.blahaj.zone ⁨1⁩ ⁨month⁩ ago

• tate@lemmy.sdf.org ⁨1⁩ ⁨month⁩ ago

  Which two event are you talking about being simultaneous? The Sun going out and Earthers observing it? Those things will not be simultaneous in any reference frame, because they are “light-like” separated.

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  • WolfLink@sh.itjust.works ⁨1⁩ ⁨month⁩ ago

    I think what he means is when the light from the sun disappearing arrives at earth, that’s effectively when the event of the sun disappearing happened from the earth’s perspective.

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    • zea_64@lemmy.blahaj.zone ⁨1⁩ ⁨month⁩ ago

      wait, who’s he?

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  • Zink@programming.dev ⁨5⁩ ⁨weeks⁩ ago

    Yep. Imagine you’re off in space such that you, the sun, and the earth make an equilateral triangle. The sun disappears, then after 8 minutes you see it disappear. Then after ANOTHER 8 minutes you see the earth go dark, because that light had to cover two of the 8-light-minute long legs of the triangle.

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