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Ep. 683: Cosmic Dawn

Astronomy Cast

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The Problem With the Cosmos Dawn

There are still large blobs of this fog even to this day around there in the universe, but they are becoming less and less dense over time. So we've got this time where I guess those first stars are starting to peep out of the dense fog. And so why is the cosmic dawn so difficult to observe? You would think that these incredibly bright stars out there would be obvious. It's giving off light from the beginning of the universe that has all been shifted into the infraredWhere until very recently we didn't have the capacity to really look directly. Even with JWST, which can see the right colors, we need to use gravitational lensing to start to magnify the

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