The JADES program used 770 hours of JWST observing time on the earliest galaxies and found the most distant galaxy yet, among other surprises.
“Previously, the earliest galaxies we could see just looked like little smudges. And yet those smudges represent millions or even billions of stars at the beginning of the universe.”JADES is revisiting a region of the sky familiar to astronomy buffs: the The HUDF is a deep-field image of a small region of the sky that took over 11 days of observations spread over months by the Hubble Space Telescope to capture.
This diagram of the evolution of the universe from the big bang to the present shows the epoch of reionization. Credit: NASA, ESA, and A. Feild Massive stars burn hot and send out potent UV radiation. The radiation ionized the hydrogen atoms, removing the electron and leading to the EOR. The Universe is now composed mostly of low-density ionized hydrogen and remains transparent and open to observation with our telescopes. Since the Universe’s early galaxies contained vast numbers of hot massive stars, they likely drove the reionization process.to explore the JWST’s images.
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