A Restless Triplet Of Galaxies (Cosmology)

The Hubble Space Telescope has captured Arp 195, a fantastic triplet of interacting galaxies featured in Halton Arp’s Atlas of Peculiar Galaxies. The image represents a bonus snapshot, obtained between one scheduled observation and another, so as not to waste even a moment of the precious space telescope time

Thanks to NASA and ESA’s Hubble Space Telescope , astronomers have captured this fantastic triplet of interacting galaxies. The system, known as Arp 195 (or Ugc 4653), is one of those present in the Atlas of Peculiar Galaxies : an astronomical catalog of some of the strangest and most wonderful galaxies in the universe, compiled by Halton Arp and published in 1966 by California Institute of Technology . Arp 195 is found in the Lynx constellation , a northern constellation so faint that its name derives from the fact that it takes the eyes of a lynx to see it.

The observation time of the Hubble Space Telescope is extremely precious and astronomers do not want to waste even a second. The Hubble observing schedule is calculated using a computer algorithm that allows the satellite to occasionally collect “bonus” snapshots between longer observations. This image of the triplet of interacting galaxies in Arp 195 is one such snapshot. Extra observations like these do more than provide spectacular images – they also help identify promising targets to observe with other telescopes, such as the upcoming James Webb Space Telescope , Jwst.

Watch the video on the youtube channel HubbleEsa (Credits: Esa / Hubble & Nasa, J. Dalcanton)

Featured image: The triplet of interacting galaxies Arp 195 as seen by the Hubble Space Telescope. Credits: Esa / Hubble & Nasa, J. Dalcanton

Provided by INAF

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