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The Universe was dark and opaque until UV energy ionized the hydrogen and made the Universe transparent. Were dwarf galaxies responsible?

The James Webb Space Telescope is not only finding galaxies forming 200 to 500 million years after the Big Bang, but also that they are bigger and brighter than astronomers expected.

We're entering a new era of astrophysics. The James Webb Space Telescope is helping scientists test existing ideas and models of how the universe was created—on a whole new level. This telescope is sending back images of galaxies forming under a billion years after the Big Bang—way earlier than astronomers had previously expected. Not only that, scientists had anticipated that later—but still very early—galaxies would be small, barely formed blobs; instead, the galaxies in these images have spiral arms. So, today's show is all about GALACTIC CONTROVERSY! Computational astroph...

How fast is the Universe expanding? Two major methods disagree. New JWST data, just released, strengthens this Hubble tension even further.

In its first year, the James Webb Space Telescope has found many galaxies from the early universe that are bigger, brighter and more mature than expected.