SCIENCE
The James Webb Space Telescope's Deepest Look Yet
GrusSun Jun 01 2025
The James Webb Space Telescope has made a groundbreaking discovery. It has captured an image of a galaxy cluster that is so massive it bends light. This cluster, known as Abell S1063, acts like a giant lens in space. It warps the light from galaxies that are much farther away. These distant galaxies are from the early universe. The telescope's Near-Infrared Camera (NIRCam) used this effect to reveal many faint galaxies and features that were previously hidden. This phenomenon is called gravitational lensing. It occurs when a massive object, like a galaxy cluster, bends the path of light from objects behind it. This creates a distorted, magnified view of those background objects.
The galaxy cluster Abell S1063 is located about 4. 5 billion light-years away from Earth. It is in the southern constellation Grus, also known as the Crane. The background galaxies that appear distorted in the image are at various distances from Earth. The James Webb Space Telescope is particularly good at capturing these types of images, known as "deep field" images. To create these images, the telescope takes a long exposure of a single area of the sky. This allows it to gather as much light as possible and see distant, faint galaxies that other telescopes cannot.
The telescope took nine separate snapshots of different near-infrared wavelengths of light. This process took around 120 hours of observing time. The magnifying effect of gravitational lensing helped to reveal some of the earliest galaxies formed in the universe. This is the deepest look at a single target that the James Webb Space Telescope has achieved so far. By focusing on a massive gravitational lens like Abell S1063, the telescope has the potential to uncover even more secrets of the early universe. This discovery is a testament to the power of the James Webb Space Telescope and its ability to push the boundaries of what we know about the universe.
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questions
What if the galaxies in Abell S1063 started a band, what would their name be?
If the JWST could take a selfie with Abell S1063, what would the caption be?
How does the gravitational lensing effect observed in Abell S1063 compare to similar phenomena in other galaxy clusters?