Astrophysicists shed light on how hydrogen fog burned away after the Big Bang. UCLA astrophysicists are among the first scientists to use the James Webb Space Telescope to get a glimpse of the earliest galaxies in the universe. The studies reveal unprecedented detail about events that took p
in the issue found that galaxies that formed soon enough after the Big Bang — within less than a billion years — might have begun burning off leftover photon-absorbing hydrogen, bringing light to a dark universe.“Even our very best telescopes really struggled to confirm the distances to such far away galaxies, so we didn’t know whether they rendered the universe transparent or not,” said Guido Roberts-Borsani, a UCLA postdoctoral researcher who led the study.
Webb is the largest near-infrared telescope in space, and its remarkable resolution offers an unparalleled view of objects so distant that their light takes billions of years to reach Earth. Although those objects have aged by now, light from only their earliest moments has had enough time to travel through the universe to end up on Webb’s detectors.
The Epoch of Reionization is a period that remains poorly understood by scientists. Until now, researchers have not had the extremely sensitive infrared instruments needed to observe galaxies that existed then. Prior to cosmic reionization, the early universe remained devoid of light because ultraviolet photons from early stars were absorbed by the hydrogen atoms that saturated space.
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Webb Image Release- Webb Space Telescope GSFC/NASAThe Latest NASA Released Webb Image is featured on this page. The James Webb Space Telescope's revolutionary technology will study every phase of cosmic history—from within our solar system to the most distant observable galaxies in the early universe. Webb’s infrared telescope will explore a wide range of science questions to help us understand the origins of the universe and our place in it. Seeking Light from the First Galaxies in the Universe Webb will directly observe a part of space and time never seen before. Webb will gaze into the epoch when the very first stars and galaxies formed, over 13.5 billion years ago. Ultraviolet and visible light emitted by the very first luminous objects has been stretched or 'redshifted' by the universe's continual expansion and arrives today as infrared light. Webb is designed to “see” this infrared light with unprecedented resolution and sensitivity. Exploring Distant Worlds and the Solar System Webb will also be a powerful tool for studying the nearby universe. Scientists will use Webb to study planets and other bodies in our solar system to determine their origin and evolution and compare them with exoplanets, planets that orbit other stars. Webb will also observe exoplanets located in their stars’ habitable zones, the regions where a planet could harbor liquid water on its surface, and can determine if and where signatures of habitability may be present. Using a technique called transmission spectroscopy, the observatory will examine starlight filtered through planetary atmospheres to learn about their chemical compositions.
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10 incredible James Webb Space Telescope images reveal the wonders of the universeThe Hubble telescope continues to be a great scientific instrument and can see at optical wavelengths where the JWST cannot. But the Webb telescope can see much further into the infrared with greater sensitivity and sharpness.
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Webb Space Telescope Captures North Ecliptic Pole – Studded With Galactic DiamondsNASA’s James Webb Space Telescope has captured one of the first medium-deep wide-field images of the cosmos, featuring a region of the sky known as the North Ecliptic Pole. The image, which accompanies a paper published on December 14 in the Astronomical Journal, is from the Prime Extragalactic Area
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Webb Space Telescope Makes Stunning Discovery: Unveils Previously Shrouded Newborn StarsWebb’s infrared camera peers through dust clouds, enabling discovery. Rice University astronomer Megan Reiter and colleagues took a “deep dive” into one of the first images from NASA’s James Webb Space Telescope and were rewarded with the discovery of telltale signs from two dozen previously unseen
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How the James Webb Space Telescope transformed astronomy this yearOne year ago, on Christmas Day, the James Webb Space Telescope was launched. Since it began collecting data, it has captured - in stunning detail - previously unobservable stars, planets and galaxies.
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‘Pillars of Creation’: James Webb telescope shows lush landscape of space first seen by HubbleThe Webb telescope’s mirrors were made in Alabama and assembled and tested for cold resistance at NASA’s Marshall Space Flight Center in Huntsville.
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