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@tealovingunicorn / tealovingunicorn.tumblr.com

Hi there. I'm Jelena. 23. Pretty random blog. I like animals, reading, and all kinds of tv shows.
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Are the first stars in the Universe invisible?

“It’s not enough, in the Universe, to simply “let there be light” in order to see the first stars: you need for that light to be able to freely travel through space! In visible light, there’s no way to see them: no matter how good the Hubble Space Telescope ever is, no matter how long it stares at these patches of sky, it will never see back to the first stars, because the Universe is still opaque to visible light.”

You’d think it would be enough to form some stars, and “let there be light” would be a reality. But these stars don’t become visible for literally hundreds of millions of years until after they form. It’s not that they don’t emit light — they do — but rather that the Universe is opaque to that light for up to half a billion years after those stars form.

#galaxy#stars#space
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