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GALEX and SDSS image of Arp 297, also known as NGC 5755, NGC 5753, NGC 5754 and NGC 5752. The left image is in ultraviolet light. The right image is in visible light. The upper and lower galaxy pairs are at different distances. Credit: Fig. 13 from Smith et al. 2010. Source

submitted 6 hours ago • 0 comments

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. Credit: NASA, ESA, STScI Source

submitted 18 hours ago • 0 comments

Composite image of Arp 298, also known as NGC 7469 and IC 5283. X-rays from Chandra (purple) are overlaid on a Hubble and JWST image of NGC 7469. 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

submitted 1 day ago • 0 comments

Kitt Peak image of Arp 30, also known as NGC 6365. Arp thought this was one galaxy with a particularly beefy arm. Later images show this is actually a pair of galaxies, one face-on and one nearly edge-on. Credit: KPNO, NOIRLab, NSF, AURA, Friends' Central School, A. Block Source

submitted 1 day ago • 0 comments

Kitt Peak image of Arp 84, also known as NGC 5394 and NGC 5395. Interactions between the galaxy pair funneled gas into the center of NGC 5394, the smaller spiral, providing the raw materials for new stars. Credit: KPNO, NOIRLab, NSF, AURA, D. Matthews, E. J. Jones, A. Block Source

submitted 2 days ago • 0 comments

Image of Arp 8, also known as NGC 497, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Spiral galaxies - Split arms. It is a barred spiral galaxy in the constellation Cetus. Source

submitted 2 days ago • 0 comments

SDSS image of Arp 82, also known as NGC 2535 and NGC 2536. The pair is in the early stages of a merger. The larger galaxy's arms have evenly spaced "beads on a string" clusters of young stars, created by recent gravitational interactions. Credit: SDSS Source

submitted 3 days ago • 0 comments

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. Red filaments are glowing dust. Credit: NASA, ESA, CSA, STScI Source

submitted 3 days ago • 3 comments

Sloan Digital Sky Survey image of Arp 6, also known as NGC 2537 or the Bear’s Paw Galaxy. The horseshoe structure may be the result of a shockwave from a nuclear starburst. Credit: Sloan Digital Sky Survey Source

submitted 4 days ago • 0 comments

Image of Arp 271, also known as NGC 5426 and NGC 5427, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Double and multiple galaxies - Connected arms. The two galaxies are interacting. Source

submitted 4 days ago • 0 comments

Hubble image of Arp 24, also known as NGC 3445. NGC 3445 has one fan-like spiral arm that is dotted with star-forming regions. It is connected to its companion galaxy, seen nearly edge-on to the left, by a weak bridge. Credit: NASA, ESA, STScI, J. Dalcanton, Judy Schmidt Source

submitted 5 days ago • 0 comments

Hubble Space Telescope image of Arp 26, also known as M101 or the Pinwheel Galaxy. The image is made from 51 individual Hubble exposures, plus data from the Canada-France-Hawaii Telescope and Kitt Peak National Observatory. Credit: NASA, ESA, STScI; CFHT, NOAO, AURA, NSF Source

submitted 5 days ago • 2 comments

Image of Arp 290, also known as IC 195 and IC 196, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Double and multiple galaxies - Wind effects. IC 196 is the larger galaxy, IC 195 is the smaller. Source

submitted 6 days ago • 0 comments

Hubble image of Arp 288, also known as NGC 5221. In 2016, a supernova appeared in the galaxy's long tidal tail to the right, about 260 thousand light years from the galactic center. Credit: NASA, ESA, STScI, J. Dalcanton, Judy Schmidt Source

submitted 6 days ago • 0 comments

Chandra, Hubble, and JWST image of Arp 220, also known as IC 4553. The hottest gas, which glows in X-rays, is shown in purple, overlayed on a infrared and visible light view of the merging galaxies. Credit: NASA, CXC, SAO, ESA, CSA, STScI, L. Frattare, J. Major Source

submitted 7 days ago • 0 comments

Hubble and Pan-STARRS image of Arp 300, also known as UGC 05028 and UGC 05029. In this image of an interacting galaxy pair, the luminosity comes from Hubble ACS/WFC observations, and color comes from Pan-STARRS. Credit: NASA, ESA, STScI, J. Dalcanton, Judy Schmidt, PanSTARRS Source

submitted 7 days ago • 0 comments

Kitt Peak National Observatory image of Arp 336, also known as NGC 2685. NGC 2685 is a polar ring galaxy. It has a ring of gas, stars, and dust that orbits perpendicular to the plane of the galaxy, seen as unusual whorls, or helical filaments. Credit: NOIRLab, AURA, NSF Source

submitted 8 days ago • 0 comments

Hubble image of Arp 321, also known as Hickson 40. This group of galaxies include three spiral galaxies, an elliptical galaxy, and a lenticular (lens-like) galaxy. Credit: NASA, ESA, STScI, A. Pagan Source

submitted 8 days ago • 0 comments

NTT image of Arp 22, also known as NGC 4027. NGC 4027 is a barred spiral galaxy with a single spiral arm. It is interacting with a smaller companion galaxy, NGC 4027A, which is just out of frame. Credit: ESO Source

submitted 9 days ago • 0 comments

Legacy Surveys image of Arp 201, also known as UGC 224. Arp 201 is an interacting galaxy pair. Credit: Legacy Surveys, D. Lang, NERSC, Meli thev, Wikimedia Commons Source

submitted 9 days ago • 0 comments

Hubble image of Arp 94, also known as NGC 3226 and NGC 3227. The large spiral galaxy, NGC 3227 is interacting with its elliptical galaxy companion, NGC 3226. Faint tidal streams of gas and dust link the pair. Credit: NASA, ESA, and H. Ford, G. Kober Source

submitted 10 days ago • 1 comment

Image of Arp 14, also known as NGC 7314, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Spiral galaxies - Detached segments. It has an active supermassive black hole at its center. Source

submitted 10 days ago • 0 comments

Hubble image of Arp 300, also known as UGC 05028 and UGC 05029. UGC 05028 (smaller spiral) and UGC 05029 (larger spiral) form an interacting galaxy pair. The bright knot in UGC 05028 may be another small galaxy. Credit: NASA, ESA, STScI, J. Dalcanton, Judy Schmidt, PanSTARRS Source

submitted 11 days ago • 0 comments

Gran Telescopio Canarias image of Arp 84, also known as NGC 5394 and NGC 5395. This interacting pair is nicknamed the "Heron Galaxy". The larger spiral, NGC 5395 forms the body of the heron and the smaller, two-armed NGC 5394 forms its neck, head, and beak. Credit: GTC, IAC Source

submitted 11 days ago • 3 comments

Hubble Space Telescope image of Arp 4. This image contains two galaxies, a larger irregular galaxy, Arp 4, and a small spiral galaxy PGC 6629. Credit: NASA, ESA, STScI, J. Dalcanton, Judy Schmidt, Pan-STARRS Source

submitted 12 days ago • 0 comments

Hubble Space Telescope image of Arp 14, also known as NGC 7314. NGC 7314 is about 50 million light years away. It has a bright core and an active supermassive black hole at its center. Credit: NASA, ESA, STScI, Solomon Hendrix Source

submitted 12 days ago • 0 comments

Spitzer image of Arp 188, also known as the Tadpole Galaxy. It is a result of a recent galactic interaction in the local universe. A small intruder galaxy created a 280,000 light-year-long tail of stars and gas. Credit: NASA/JPL-Caltech/C. Lonsdale (IPAC/Caltech), SWIRE Team Source

submitted 13 days ago • 0 comments

Image of Arp 299, also known as NGC 3690, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Double and multiple galaxies - Unclassified objects. Interactions between the pair triggered a starburst. Source

submitted 13 days ago • 0 comments

Image of Arp 23, also known as NGC 4618, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Spiral galaxies - One-armed. Its unusual shape may come from interactions with its companion. Source

submitted 14 days ago • 0 comments

Composite image of Arp 16, also known as M66. Chandra (X-ray, blue), Spitzer (infrared, red), Hubble and VLT (visible light, yellow). Insert shows hot gas near the supermassive black hole. Credit: NASA, STScI, JPL-Caltech, ESO, WFI, CXC, Ohio State Univ., C.Grier et al Source

submitted 14 days ago • 0 comments

Image of Arp 297, also known as NGC 5755, NGC 5753, NGC 5754 and NGC 5752, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Double and multiple galaxies - Long filaments. Source

submitted 15 days ago • 0 comments

Hubble Space Telescope image of Arp 6, also known as NGC 2537 or the Bear’s Paw Galaxy. It has a nucleus that is rapidly forming stars, surrounded by a horseshoe-shaped structure, also forming new stars. Credit: NASA, ESA, STScI, J. Dalcanton, Judy Schmidt Source

submitted 15 days ago • 0 comments

Hubble Space Telescope image of Arp 5, also known as NGC 3664. NGC 3664 is a barred Magellanic spiral galaxy with a single spiral arm and prominent bar. It is interacting with a dwarf galaxy, out of frame. Credit: NASA, ESA, STScI, Solomon Hendrix Source

submitted 16 days ago • 0 comments

Image of Arp 194, also known as UGC 6945, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Amorphous galaxies - Material ejected from nuclei. This interacting group has several spiral galaxies. Source

submitted 16 days ago • 0 comments

Image of Arp 201, also known as UGC 224, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Amorphous galaxies - Material ejected from nuclei. Arp 201 is an interacting galaxy pair. Source

submitted 17 days ago • 0 comments

Image of Arp 11, also known as UGC 717, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Spiral galaxies - Split arms. UGC 717 is the large spiral galaxy at center. Source

submitted 17 days ago • 0 comments

Hubble image of Arp 70, also known as VV 341. In Arp 70, a larger galaxy with two well-defined spiral arms interacts with a small companion. Such interactions have been linked to the production of grand-design spiral arms. Credit: NASA, ESA, STScI, J. Dalcanton, Judy Schmidt Source

submitted 18 days ago • 1 comment

Image of Arp 13, also known as NGC 7448, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Spiral galaxies - Detached segments. It has particularly bright spiral arms. Source

submitted 18 days ago • 0 comments

Burrell Schmidt telescope image of Arp 16, also known as M66. M66 is part of the Leo Triplet, a small galaxy group. Edge-on spiral NGC 3628 is at upper left. The nearly face-on spirals M66 and M65 are at lower left and lower right. Credit: REU program, NOIRLab, NSF, AURA Source

submitted 19 days ago • 0 comments

Image of Arp 122, also known as NGC 6040 and LEDA 59642, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Elliptical galaxies - Close to and perturbing spiral galaxies. Actually two galaxies. Source

submitted 19 days ago • 0 comments

Composite image of Arp 26, also known as M101 or the Pinwheel Galaxy. X-rays from NuSTAR (green) show a supernova, on a visible light (KPNO, yellow and red) and far-UV (GALEX, blue) image of M101. Credit: NASA, JPL-Caltech, NOIRLab, NSF, AURA, B. Grefenstette, R. Hurt Source

submitted 20 days ago • 1 comment

Hubble Space Telescope image of Arp 4. This image contains two galaxies, a larger irregular galaxy, Arp 4, and a small spiral galaxy PGC 6629. Credit: NASA, ESA, STScI, Julianne Dalcanton, Meli thev, Wikimedia Commons Source

submitted 20 days ago • 0 comments

Image of Arp 147, also known as IC 298, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Amorphous galaxies - Associated rings. The right galaxy's ring formed when its companion hit its center. Source

submitted 21 days ago • 0 comments

Image of Arp 91, also known as NGC 5953 and NGC 5954, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Spiral galaxies - Large, high surface brightness companions. A tidal tail connects the pair. Source

submitted 21 days ago • 0 comments

Image of Arp 6, also known as NGC 2537 or the Bear’s Paw Galaxy, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Spiral galaxies - Low surface brightness. Source

submitted 22 days ago • 0 comments

Hubble Space Telescope image of Arp 16, also known as M66. M66 was discovered by Charles Messier on 1 March 1780, object 66 in his catalog of “fuzzy things in the night sky that are not comets." He described it as "very long and very faint." Credit: NASA, ESA, STScI Source

submitted 22 days ago • 0 comments

Image of Arp 274, also known as NGC 5679, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Double and multiple galaxies - Connected arms. It is a system of three overlapping, interacting galaxies. Source

submitted 23 days ago • 0 comments

Legacy Surveys image of Arp 11, also known as UGC 717. UGC 717 is the large spiral galaxy in the lower right. The large spiral in the upper left is UGC 719. Credit: Legacy Surveys, D. Lang, NERSC, Meli thev, Wikimedia Commons Source

submitted 23 days ago • 0 comments

Image of Arp 200, also known as NGC 1134, from Halton Arp's Atlas of Peculiar Galaxies (1966). In the original catalog it was in the category: Amorphous galaxies - Material ejected from nuclei. It is likely interacting with a small companion. Source

submitted 24 days ago • 0 comments

GALEX image of Arp 286, also known as NGC 5560, NGC 5566, and NGC 5569. Ultraviolet light shows the youngest, hottest stars in this interacting galaxy triplett. NGC 5566 is at center, NGC 5569 at bottom left, and NGC 5560 at top left. Credit: NASA, JPL-Caltech Source

submitted 24 days ago • 0 comments