Galaxies in a cosmic house of mirrors

Automatically curated summary from European Space Agency.

A new image from the NASA/ESA/CSA James Webb Space Telescope captures the galaxy cluster MACS J0454.1-0300 as it appeared when the universe was roughly eight billion years old. According to the European Space Agency, the cluster acts as a gravitational lens, bending and magnifying light from far more distant background galaxies. This effect exposes early cosmic structures, including a merging galaxy group from two billion years after the Big Bang. Webb's sensitivity to redder light reveals hundreds of faint, distant galaxies that were missing from a 2014 Hubble image of the same region.

Context and limitations

The report is based on a publicity release from the European Space Agency describing image data from observing programs #5058 and #6882, rather than a full peer-reviewed scientific paper.