This JWST Image Shows Gravitational Lensing at its Finest universetoday storybywill
The Cosmic Seahorse galaxy is the stretched-out red arc in the vicinity of the lens, appearing much brighter and thicker than the others. Like many previous releases by the JWST team, this image was part of a campaign that follows up on previous observations made with the venerable Hubble Space Telescope . The image was captured by the’s primary near-infrared camera, as part of a program designed to study the earliest stages of star formation in distant galaxies.
This program is consistent with a major science objective for the JWST: to push the boundaries of astrophysics and cosmology by observing how galaxies formed in the early Universe . By comparing this data to observations of galaxies in more recent epochs, astronomers can track how the Universe has evolved over time, which will help resolve some enduring cosmological mysteries.
Based on our current understanding of galactic evolution, the first generation of stars in the Universe were composed entirely of hydrogen and helium. These stars slowly created heavier elements in their interiors through nuclear fusion, then dispersed them when they went supernova and blew off their outer layers. This seeded the interstellar medium of our galaxy with minerals and metals that formed subsequent generations of stars .
Studying early galaxies will allow astronomers to test our models of galactic evolution and learn more about how galaxies changed over time. These observations will provide rich datasets for the astronomical community, allowing various investigations into cosmic phenomena. They will also demonstrate the capabilities of Webb as it peers farther back into the Universe than any observatory has ever seen.
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