Newborn stars sculpt their galaxies in new James Webb telescope images

Newborn stars sculpt their galaxies in new James Webb telescope images

A gaggle of galaxies crackle with intricate detail in new images from the James Webb Space Telescope. JWST’s sharp infrared eyes are revealing how newborn stars shape their surroundings, giving hints to how stars and galaxies grow up together.

“We were just blown away,” says Janice Lee, an astronomer at the University of Arizona in Tucson. She and more than 100 astronomers reported on scientists’ first look at these galaxies with JWST in a special February issue of the Astrophysical Journal Letters.

Before JWST launched in December 2021, Lee and her colleagues selected 19 galaxies that, if observed with the telescope, they thought could reveal new details of the life cycles of stars (SN: 1/24/22). These galaxies are relatively close, within 65 million light-years of the Milky Way, and all have different types of spiral structures. The team had observed the galaxies with many observatories, but parts

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Shockwaves in the ‘cosmic web’ connecting galaxies seen for 1st time

Shockwaves in the ‘cosmic web’ connecting galaxies seen for 1st time

A composite image of the prior 3 images data-based simulations, including radio, magnetic fields and gases. (Image credit: F. Vazza, D. Wittor and J. West)

Scientists have discovered the first evidence of shockwaves rippling through the “cosmic web,” a massive network of interweaving filaments that represents the largest structure in the universe. 

The discovery represents tantalizing evidence of magnetic fields weaving through the gas, dust, and dark matter tendrils which link galaxies together.

Scientists first began to think that on the largest scales, the universe is ordered in a web-like pattern with filaments that cross vast voids in space and pull galaxies into clusters in the 1960s. Two decades later using computer modeling, researchers were able to determine what this vast universal network might look like for the first time.

Astronomers have since mapped the cosmic web with actual observations in the process answering questions about its structure. One element

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