The James Webb Space Telescope sends back its first stellar photo
Welcome to the next chapter of astronomy.
The James Webb Space Telescope has captured its first image, and it revealed that its instruments would enjoy perfect vision into yet-unseen depths of the ancient universe.
NASA released the first image captured by the JWST on Wednesday, March 16, 2021 — which was a test shot and not part of a scientific study — to witness the space telescope 18 hexagonal, yellow mirrors synced into collaboration. Still, the test reveals what this powerful piece of technology can do when pointed at a star roughly 1 million miles away from Earth, according to the space agency's official website.
The telescope captured the image in February 2022, but the consequences will continue to make waves for decades and perhaps centuries.
Thousands of galaxies photobombed James Webb Telescope's test image
Scientists were ecstatic when they finally got a glimpse of Webb's test photos that captured the light of a star 100 times fainter than our human eyes can see — 2,000 light-years away from our planet. The James Webb Space Telescope's mirrors, combined with filters that tinted the distant star's light into a red, spiky figure, created the image. But the highlight of the image wasn't the foreground.
Behind the spiky star, thousands of distant galaxies loomed mysteriously, highlighting the unrealized potential of Webb. "You can't help but see those thousands of galaxies behind it, really gorgeous," says Webb Operations Project Scientist Jane Rigby in a press release.
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To be precise, these distant galaxies are ancient — several billions of years. But this is only a taste of Webb's capabilities, which scientists expect can see as far as "a couple hundred million years after the Big Bang," added Rigby.
The James Webb Space Telescope is about to rock astronomy
As the flagship successor to the Hubble Space Telescope, the James Webb Space Telescope will give astronomy wave after wave of discovery. Hopes are high that it will not only reveal the chemical content of many alien worlds suspected to have the makings for life but also show the conditions of the very early universe in ways we've only imagined.
"This summer, Webb will start searching for galaxies in the distant universe," says L.Y. Aaron Yung, a postdoc at NASA's Goddard Space Flight Center. In 1995, Hubble captured a spectacular image of the ancient universe, called the Hubble Deep Field, of what to the naked eye appears as one of the darkest, emptiest patches of sky.
A few years later, in the early 2000s, Hubble's Ultra-Deep Field image surpassed that accomplishment. Webb's advanced equipment — namely, the Near-Infrared Spectrograph (NIRSpec) — should ensure that Hubble's successor will continue that scientific exploration. Namely, the JWST will reveal the distance to ancient galaxies, the types of stars that comprise them, and "the relative abundance of life-giving elements such as oxygen and carbon in their interstellar gas," in the words of NASA.
Paradigm-shifting discoveries — The latest image is unquestionably dominated by the central star, but even so, Webb's immense capabilities couldn't help but also capture thousands of ancient galaxies. Once its science missions begin this summer, one can only imagine how mesmerizing the wonders it reveals will be. So we'd best prepare for paradigm-shifting discoveries in 2022 and beyond.
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