Astronomers have spotted a lonely galaxy over 9 billion light-years from Earth that could change everything we know about galaxy clusters.
Image: X-ray: NASA/CXC/Univ. of Torino/V. Missaglia et al.; Optical: NASA/ESA/STScI & International Gemini Observatory/NOIRLab/NSF/AURA; Infrared: NASA/ESA/STScI; Radio: NRAO/AUI/NSF
The belief is that this lonely galaxy merged with the others, creating what we now see as 3C 297. It’s also believed that 3C 297 was the largest galaxy within the cluster and thus had the most gravitational pull out of those within it. The jets from the quasar found within the lonely galaxy suggest that it has interacted with large stores of gas within 3C 297, which could be an indication of a cluster once existing here. Of course, looking at the image above, the galaxy doesn’t look that alone. However, astronomers say none of the galaxies visible around it are close enough for a cluster.
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