Tim Urban
@waitbutwhy · 28 mai 2022
Betelgeuse is 642 light years away and we can easily see it with our naked eye. Which means it’s at the center of a vast sphere, thousands of light years across, entirely filled with its photons. Go anywhere in that sphere & look toward Betelgeuse & its photons will hit your eye.
Elon Musk
@elonmusk
So many photons flying around, and yet so few
10:11 · 28 mai 2022 · 0 vues
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