About 670 million light-years away in the constellation Eridanus in the southern celestial hemisphere lies a region known as Arp-Madore 417-391. A whole scattering of unusual galaxies scattered throughout the sky found their refuge there. The most impressive are those instances that directly interact with each other. Not so long ago, astronomers discovered the process of merging or galactic collision – two galaxies located side by side were distorted by gravity and twisted into a ring.
To capture this phenomenon, the researchers used the Advanced Camera for Surveys (ACS) aboard the Hubble Space Telescope, which was sent to observe the Arp-Madore 417-391 region between other scheduled missions. This camera is specially optimized for searching for galaxies and clusters of galaxies in the universe. Despite the fact that this tool is already 20 years old, it has been involved in many scientific discoveries throughout the time – from creating a map of the distribution of dark matter to studying the evolution of galaxy clusters.
The color image Arp-Madore 417-391 was created from separate images taken in the visible and near infrared ranges. Four filters were used to sample different wavelengths, and color comes from assigning different hues to each monochrome image associated with a particular filter.
This image comes from Hubble observations, which are then put on a list of intriguing targets for future study by the James Webb Orbital Observatory and other ground-based telescopes. Over time, this will allow astronomers to create a whole “zoo” of unusual galaxies.
Source: Trash Box
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