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#arpgalaxy

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JWST NIRCam and MIRI image of Arp 142, also known as NGC 2936, NGC 2937, and UGC 5130, or the Penguin and the Egg.

The Penguin is a spiral galaxy whose shape has been distorted by the gravity of the elliptical Egg galaxy. The two are about 100,000 light-years apart and completed a close pass between 25 and 75 million years ago.

Credit: NASA, ESA, CSA, STScI
Source: webbtelescope.org/contents/med

Hubble image of Arp 202, also known as NGC 2719 and NGC 2719A.

This pair of galaxies, an edge-on disk galaxy near the bottom of the frame and a smaller irregularly shaped galaxy above it, had a recent interaction which likely severely perturbed both galaxies. A small tidal tail trails off to the upper left corner of the image.

Credit: NASA, ESA, STScI, Julianne Dalcanton, Meli thev, Wikimedia Commons
Source: commons.wikimedia.org/wiki/Fil

Hubble image of Arp 55, also known as UGC 4881.

This pair of galaxies is about halfway through a merger. Their cores are separate, but their disks are overlapping.

The bright tail that curves around the bottom of the galaxies is dotted with young, blue star clusters, likely the result of the merger triggering a burst of star formation.

Credit: NASA, ESA, STScI
Source: science.nasa.gov/asset/hubble/

Hubble image of Arp 282, also known as NGC 169 and NGC 169A.

Both NGC 169 (bottom) and NGC 169A (top) have actively accreting supermassive black holes in their centers. The two galaxies are interacting, creating delicate streams of stars, gas and dust that visibly link the pair.

Credit: ESA/Hubble & NASA, J. Dalcanton, Dark Energy Survey, DOE, FNAL/DECam, CTIO/NOIRLab/NSF/AURA, SDSS, J. Schmidt
Source: esahubble.org/images/potw2206a/

Hubble image of Arp 82, also known as NGC 2535 and NGC 2536.

NGC 2535 is the grand design spiral at center and NGC 2536 is its smaller companion at the end of one of its arms.

The larger galaxy's inner arms have evenly spaced "beads on a string" star clusters. This suggests recent gravitational interactions created shocks that led to a burst of star formation.

Credit: NASA, ESA, STScI, J. Dalcanton, Judy Schmidt
Source: flickr.com/photos/geckzilla/48

Gemini South image of Arp 271, also known as NGC 5426 and NGC 5427.

This pair of interacting galaxies are tugging on each other with gravity, which has begun to distort their features. We can see this in the bridge of stars connecting the spiral arms of NGC 5426, the upper left galaxy, with NGC 5427, the lower right galaxy.

Credit: International Gemini Observatory, NOIRLab, NSF, AURA
Source: noirlab.edu/public/images/gemi

Hubble image of Arp 297, also known as NGC 5754 and NGC 5752.

NGC 5754, the large spiral galaxy, has kinked arms just beyond its inner ring. They are a result of interactions with its companion galaxy, NGC 5752, the smaller galaxy at bottom left. The same interactions triggered a starburst in NGC 5752, creating bright star clusters around its core.

Credit: NASA, ESA, the Hubble Heritage team, W. Keel
Source: science.nasa.gov/asset/hubble/

Hubble image of Arp 195, also known as UGC 4653.

This image of three interacting galaxies is from the Establishing HST's Low Redshift Archive of Interacting Systems snapshot program. These programs fill in gaps in Hubble's schedule (2-3 percent of the available time) with short observations.

In this image, the luminosity is from Hubble ACS/WFC observations, and color is from DECam and SDSS.

Credit: ESA, NASA, J. Dalcanton
Source: esahubble.org/images/potw2130a/

Dark Energy Camera image of Arp 289, also known as NGC 3981.

The galaxy's irregular arms are likely due to gravitational interactions with a neighboring galaxy.

NGC 3981 is a member of the NGC 4038 galaxy group. This group also contains the Antennae Galaxies, another famous example of galactic interactions.

Credit: Dark Energy Survey, DOE, FNAL, DECam, CTIO, NOIRLab, NSF, AURA, R. Colombari, M. Zamani
Source: noirlab.edu/public/images/iotw

Kitt Peak National Observatory image of Arp 104, also known as NGC 5216 and NGC 5218, or Keenan’s System.

A bridge of stars and gas about 7,000 light years wide and 150,000 light years long connects the two galaxies.

It may have been created about 300 million years ago when the disk galaxy NGC 5218 (top) and elliptical galaxy NGC 5216 (bottom) passed by one another.

Credit: NOIRLab, NSF, AURA, T.A. Rector, H. Schweiker
Source: noirlab.edu/public/images/noao

Hubble image of Arp 116, also known as M60 and NGC 4647.

M60 is a giant elliptical galaxy. The smaller spiral NGC 4647 is about the size of our galaxy, the Milky Way. While it is not obvious, the two galaxies are just beginning to interact.

The stripped core of another galaxy, which contains a supermassive black hole, is seen as a white dot in the lower right part of M60.

Credit: NASA, ESA, STScI
Source: science.nasa.gov/asset/hubble/

Composite image of Arp 298, also known as NGC 7469 and IC 5283.

X-rays from Chandra (purple) are overlaid on a Hubble visible/infrared and JWST infrared image of NGC 7469.

Large, red diffraction spikes and X-ray light near the center signal the presence of a supermassive black hole.

Credit: NASA, CXC, X. Xu; NASA, ESA, UVA, NRAO, A. S. Evans, Hubble Heritage team; NASA, ESA, CSA, L. Armus, A. S. Evans; J. Major
Source: chandra.harvard.edu/photo/2024

SDSS image of Arp 82, also known as NGC 2535 and NGC 2536.

Simulations suggest the two galaxies are in the early stages of a merger. The pair already experienced one collision and are just about to collide again.

The larger galaxy's inner arms have evenly spaced "beads on a string" star clusters. This suggests the recent gravitational interactions created shocks that led to a burst of star formation.

Credit: SDSS
Source: legacysurvey.org/viewer?ra=122

JWST NIRCam image of Arp 142, also known as NGC 2936 and NGC 2937, or the Penguin and the Egg.

The blue haze in the distorted spiral galaxy, elliptical galaxy, and the bridge connecting the two, are stars. The red filaments are glowing dust. The edge-on galaxy at top right is in the foreground, significantly closer to us than the Penguin and the Egg.

Credit: NASA, ESA, CSA, STScI
Source: webbtelescope.org/contents/med