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@futurebird

1. First stars, 100 million years after the big bang

2. If a grade school student is ready for this idea, it's very interesting to me that because of the speed of light, the further away we look in distance the further back we look in time. And if you get too far back, you can't see anything, because the pre-star-formation, neutral-hydrogen era is just opaque! I think it's interesting if you look too far back in time there's a literal cloud you can't see through.