page_title: JKCS 041
hierarchical_section_title: JKCS 041
caption_attribution_description: English: This is a composite image of the most distant galaxy cluster yet detected. This image contains X-rays from NASA's Chandra X-ray Observatory, optical data from the Very Large Telescope (VLT), and optical and infrared data from the Digitized Sky Survey. This record-breaking object, known as JKCS041, is observed as it was when the Universe was just one quarter of its current age. X-rays from Chandra are displayed here as the diffuse blue region, while the individual galaxies in the cluster are seen in white in the VLTs optical data, embedded in the X-ray emission.
context_page_description: JKCS 041 is a group of galaxies with the distinction of being the farthest away galaxy group from Earth ever observed, as of 2009. It is estimated to be 9.9 billion light years away, seen at redshift 1.9. The cluster is located in the constellation Cetus at a photometrically determined redshift of z=1.9 at right ascension 2ʰ 26ᵐ 44ˢ declination −04° 41′ 37″. There are at least 19 members in the cluster.
context_section_description: JKCS 041 is a group of galaxies with the distinction of being the farthest away galaxy group from Earth ever observed, as of 2009. It is estimated to be 9.9 billion light years away, seen at redshift 1.9. The cluster is located in the constellation Cetus at a photometrically determined redshift of z=1.9 at right ascension  2ʰ 26ᵐ 44ˢ declination −04° 41′ 37″ (J2000.0). There are at least 19 members in the cluster.
caption: JKCS 041 (Chandra X-ray)
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