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#galaxy

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Arp Bot 🤖

Image of Arp 289, also known as NGC 3981, from the Atlas of Peculiar Galaxies by Halton Arp (1966).

In the original catalog, it was in the category: Double and multiple galaxies - Wind effects. Its irregular arms are likely due to gravitational interactions with a neighboring galaxy.

NGC 3981 is a member of the NGC 4038 galaxy group, which also contains the Antennae Galaxies, a well-known example of interacting galaxies.

Source: ned.ipac.caltech.edu/level5/Ar

A grainy, black and white image of a disrupted spiral galaxy, surrounded by irregular spiral arms. The inner part of the galaxy is seen at an angle, so that it appears oval-shaped rather than circular. The faint arms unfurl from the center, like paint flung out of a spinning canvas. The arms stretch out to the right of the frame. The black background of space is filled with white dots, which are foreground stars.
#ArpGalaxy#Galaxy#Space
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Astronomy Picture of the Day

APOD from 2025-04-10

38 Hours with the M81 Group

Over 38 hours, a garden #telescope captured the M81 #galaxy group. Dominant M81 boasts spiral arms and a bright core, while cigar-shaped M82 shows intense star formation due to their billion-year gravitational tussle. Eventually, they'll merge into one galaxy. The image also features NGC 3077 and distant integrated flux nebulae from our Milky Way.

HD image at apod.nasa.gov/apod/ap250410.ht #astronomy #planet #earth

38 Hours with the M81 Group
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Arp Bot 🤖

Ground-based image of Arp 16, also known as M66.

M66 is a member of the Leo Triplet. NGC 3628, the galaxy in the upper left, likely had an encounter with M66 a few hundred million years ago, creating a dramatic tail-like plume.
Gravitational interactions between the three galaxies may also be responsible for M66’s distorted shape and prominent spiral arms.

Credit: Fig 1, G. Wu et al. (2022)
Source: ui.adsabs.harvard.edu/abs/2022

A color image of three widely separated galaxies. The galaxy at the upper left, NGC 3628, is an edge-on spiral, seen as a thin rectangular shape with a light brown dust lane going through the middle. A translucent, curved plume, about two times the length of the galaxy trails off to the left. The galaxy at lower left, M 66, is a face-on barred spiral galaxy, with a bright central bar and two spiral arms, which form an S-shape. The galaxy at lower right, M 65, is a nearly face-on spiral, with a bright nucleus and curving dust lanes. The image is very dense with foreground stars. A scale bar marking 50 kpc takes up about 1/6 of the width of the image.
#ArpGalaxy#Galaxy#Space
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Arp Bot 🤖

Hubble Space Telescope image of Arp 147, also known as IC 298.

The clumpy, blue ring in the galaxy on the right likely formed when the companion galaxy to the left crashed through its center. This sent a pressure wave outward, like a ripple in a pond, compressing the right galaxy's gas and triggering the formation of new stars.

Credit: NASA, ESA, and M. Livio (STScI)
Source: hubblesite.org/contents/media/

Two ring-like galaxies. On the left is a galaxy with a bright core surrounded by a yellow ring. There is a gap between the core and ring where the black background of space shows through. The galaxy is tilted so that the circular ring appears oval-shaped. On the right is a another circular galaxy, made mostly of a ring of bright blue dots, which are star clusters. On the bottom left part of the ring is a haze of white stars and orangish dust. The center of the ring is empty and the black background of space shows through. This galaxy looks a little like the writing of the aliens from the movie Arrival.
#ArpGalaxy#Galaxy#Space
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