The Straussian astronomy breaks down a little bit depending on exactly what sort of radioactivity you are looking at, because unlike actual solar emissions they arrive on very different timescales, and also they're on a distribution rather than calculable enough to set watch by.
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And this light is 100,000 years and eight minutes old.
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From the light’s point of view it hasn’t aged a day.
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Have been reading The Three Body problem trilogy and staring up at space every night as a pre-req before reading time. Been thinking about this A LOT. It’s interesting to look at one twinkle and think, hey that 57,000 years ago, and another one is 648,000 years old.
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Those books changed my life.
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Unless something drastic happened between the then now and now.

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Reading the replies, I think a lot of people are missing what you are referring to! (Pretty sure I got it though)
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The diagrams physicist use to grapple with this are actually so cool. It sucks that after a 4+ year break I’m starting to lose the ability to grok it all https://en.m.wikipedia.org/wiki/Minkowski_diagram …
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I've been looking for a good analogy for this. I will steal this.
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