NASA and the ESA have released a Hubble image of Arp-Madore 417-391, a strange galaxy collision about 670 million light-years away. Their gravitational tug-of-war has produced an odd ring-like shape where the two galactic cores are relatively close and the star “plumes” form a circle.
The telescope spotted the merger using its long-serving Advanced Camera for Surveys, which has helped detect strange galaxies and even dark matter. Researchers are using the orbital hardware to build a list of follow-up observations for the much newer James Webb telescope, which has sometimes been used in tandem with Hubble to study space objects.
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