Legacy Astronomical Images > Galaxies Series > Peculiar Galaxies Unit

Tidal Interactions in M81 Group

Description: This pair of images illustrates the need to study celestial objects at different wavelengths in order to get "the whole picture" of what is happening with those objects. At left, you see a visible-light image of the M81 Group of galaxies (from the…

Star Birth Triggered by a Jet from a Black Hole

Description: This image of the cluster of galaxies known as Abell 194 shows two radio galaxies shooting out huge, powerful jets of material from the regions surrounding the black holes at the galaxies' centers. These jets are visible in the radio data from the…

Atomic Gas in the Ring Galaxy Arp 143

Description: A composite image of the optical light (green and yellow) and cold atomic hydrogen gas (blue) in the "Ring Galaxy" Arp 143 (a.k.a. NGC 2444/5). The atomic hydrogen observations, taken with the VLA in its C and D-array configurations, shows a…

Atomic Gas in the 'Atoms for Peace' Galaxy

Description: A composite image of the optical light (green), star forming regions (yellow and pink), and cold atomic hydrogen gas (blue) in the well known merger remnant NGC 7252, the "Atoms for Peace" galaxy. The nickname of this object derives from its optical…

Atomic Gas in the Merger Remnant NGC 3921

Description: A composite image of the optical light (green), warm gas (yellow and pink), and cold atomic hydrogen gas (blue) in the well known merger remnant NGC 3921, also known as Arp 224. NGC 3921 is the galaxy to the lower left of the image. It is in a small…

Atomic Gas in 'The Mice'

Description: A composite image of the optical light (green), warm gas (pinkish white), and cold atomic hydrogen gas (blue) in the well known interacting pair of galaxies known as "The Mice", or NGC 4676. The nickname of this object derives from its optical…

Atomic Gas in the Merging System NGC 520

Description: A composite image of the optical light (green), warm gas (yellow), and cold atomic hydrogen gas (blue) in the merging system NGC 520, also known as Arp 157. NGC 520 is the galaxy near the middle, and is believed to be the result of two disk galaxies…

Atomic Gas in the Arp 295 Group

Description: A composite image of the optical light (green and yellow), star forming regions (pinkish white), and cold atomic hydrogen gas (blue) in the classic bridge-tail system Arp 295. The atomic hydrogen observations, taken with the VLA in its C and D-array…

Atomic Gas in the Antennae

Description: Composite image of the nearby merging galaxy, NGC 4038/9, also known as "The Antennae", due to the antennae-like morphology of its two prominant tidal tails. The image shows a true-color representation of the optical starlight, with the neutral…

UGC 813 and UGC 816

Description: This composite image shows visible light (green), neutral Hydrogen gas (blue), and 1.4 GHz radio continuum (red) emission. The bright galaxies UGC 813 (center) and UGC 816 (left) appear white because they emit at all three wavelengths. They were…

Interacting Group Arp 313

Description: A collection of radio and optical images of the interacting group of galaxies Arp 313, composed of the galaxies NGC 3991, NGC 3994, and NGC 3995. Clockwise (from the upper left panel) are the distribution of total atomic hydrogen (HI) shown as…

VLA and HST Observations of the Antennae

Description: These two colliding galaxies, NGC 4038 (top) and NGC 4039 (bottom) are collectively known as "The Antennae". The figure on the left shows the neutral hydrogen gas (HI) in blue, mapped with the NRAO Very Large Array, superimposed on an optical image…

Supernova Factory in Arp 299

Description: This image of the colliding galaxy pair Arp 299 (also known as NGC 3690/IC694) was produced combining radio wavelength observations from the National Radio Astronomy Observatory's Very Large Array with data from the Hubble Space Telescope. Radio…

Second Pair of Taffy Galaxies

Description: The "Taffy" galaxies: This composite image shows the results of a collision between two galaxies, UGC 813 (right) and UGC 816 (left). The optical emission from stars appears in its natural color, 21 cm radio emission from interstellar atomic Hydrogen…

Arp 299

Description: A composite image of the optical light (green and yellow) and cold atomic hydrogen gas (blue) in the peculiar galaxy Arp 299, also known as NGC 3690/IC 694. Arp 299 is the result of two spiral galaxies which are in the process of colliding and…

Atomic Gas in Arp 220

Description: Composite image of the nearest Ultraluminous Infrared Galaxy (ULIG), Arp 220. The image shows the optical starlight depicted in green, yellow, and orange, with the neutral atomic hydrogen gas depicted in blue. ULIGs emit more energy in the Infrared…

Extensive Gas Tail in the Peculiar Galaxy Arp 299