ESA · Space

Webb Telescope Captures Cosmic 'House of Mirrors'

The James Webb Space Telescope has captured a stunning image of the galaxy cluster MACS J0454.1-0300, revealing distant galaxies warped and multiplied by gravitational lensing.

The image showcases the galaxy cluster MACS J0454.1-0300, with light from its galaxies having traveled for 8 billion years. More distant orange galaxies are also visible, appearing warped and stretched.

This distortion is caused by gravitational lensing, where the massive cluster bends and magnifies light from background objects. This phenomenon allows astronomers to observe galaxies too distant for normal telescopic viewing.

The lensing effect reveals multiple images of young galaxies, including a group from 2 billion years after the Big Bang and a single galaxy from 800 million years after the Big Bang.

Astronomers have identified bright 'knots' within these lensed areas, corresponding to regions as small as 5 light-years across, magnified over 300 times.

A comparison with a 2014 Hubble Space Telescope image of the same cluster shows a dramatic difference, with Webb revealing hundreds of previously unseen galaxies due to its greater sensitivity to redder light.

The data for this image comes from two observing programs utilizing the lensing capabilities of massive galaxy clusters to view distant objects.

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