Pandora's Cluster

This picture from NASA's James Webb Space Telescope reportedly shows 50,000 sources of near-infrared light. To get to the telescope's detectors, their light had to travel over a variety of distances, which allowed it to capture the expanse of space in a one picture. To the right of the image center is a foreground star in our own galaxy that exhibits Webb's recognizable diffraction spikes. The galaxies of Pandora's Cluster, a collection of existing huge clusters of galaxies merging to form a megacluster, are bright white objects surrounded by a hazy haze. Since there is such a high concentration of mass, gravity distorts spacetime, which makes the area of particular interest to astronomers since it acts as a "gravitational lens" that allows them to observe extremely far-off light sources that would otherwise be invisible, even to Webb.

SCIENCE: NASA, ESA, CSA, Ivo Labbe (Swinburne), Rachel Bezanson (University of Pittsburgh)
IMAGE PROCESSING: Alyssa Pagan (STScI)

In the picture, these lensed sources are red and frequently appear as elongated arcs that have been warped by the gravitational lens. Many of these galaxies are from the early cosmos, and astronomers may examine their contents because they have been stretched out and enlarged. In order to identify the real nature of the other red sources in the picture, more observations with Webb's Near-Infrared Spectrograph (NIRSpec) instrument are required. One noteworthy instance is a very compact source that, despite the gravitational lens's enlarging effect, appears as a small red dot. The dot may be a gigantic black hole from the early cosmos, for example. There will be a lot of previously unobtainable knowledge about the cosmos and how it has changed over time thanks to the NIRSpec data, which will offer distance measurements and compositional information on a few chosen sources.