NIRSpec tagged posts

NASA’s Webb Telescope reveals Links between Galaxies Near and Far

A trio of faint objects (circled) captured in the James Webb Space Telescope’s deep image of the galaxy cluster SMACS 0723 exhibit properties remarkably similar to rare, small galaxies called “green peas” found much closer to home. The cluster’s mass makes it a gravitational lens, which both magnifies and distorts the appearance of background galaxies. We view these early peas as they existed when the universe was about 5% its current age of 13.8 billion years. The farthest pea, at left, contains just 2% the oxygen abundance of a galaxy like our own and might be the most chemically primitive galaxy yet identified.
Credit: NASA, ESA, CSA, and STScI

A new analysis of distant galaxies imaged by NASA’s James Webb Space Telescope shows that they are extremely young and share some rem...

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