File:PGC2456 Potw2309a.jpg

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Summary

Description
English: A jellyfish galaxy with trailing tentacles of stars hangs in inky blackness in this image from the NASA/ESA Hubble Space Telescope. As Jellyfish galaxies move through intergalactic space they are slowly stripped of gas, which trails behind the galaxy in tendrils illuminated by clumps of star formation. These blue tendrils are visible drifting below the core of this galaxy, and give it its jellyfish-like appearance. This particular jellyfish galaxy— known as JO201 — lies in the constellation Cetus, which is named after a sea monster from ancient Greek mythology. This sea-monster-themed constellation adds to the nautical theme of this image. The tendrils of jellyfish galaxies extend beyond the bright disc of the galaxy core. This particular observation comes from an investigation into the sizes, masses and ages of the clumps of star formation in the tendrils of jellyfish galaxies. Astronomers hope that this will provide a breakthrough in understanding the connection between ram-pressure stripping — the process that creates the tendrils of jellyfish galaxies — and star formation. This galactic seascape was captured by Wide Field Camera 3 (WFC3), a versatile instrument that captures images at ultraviolet and visible wavelengths. WFC3 is the source of some of Hubble’s most spectacular images, from a view of Jupiter and Europa to a revisit to the Pillars of Creation. [Image description: A spiral galaxy lies just off-centre. It has large, faint, reddish spiral arms and a bright, reddish core. These lie over two brighter blue spiral arms. These are patchy, with blotches of star formation. Long trails of these bright blotches trail down from the lower spiral arm, resembling tendrils. The background is black, lightly scattered with small galaxies and stars, and a larger elliptical galaxy in one corner.] Links First science paper in the Astrophysical Journal Second science paper in the Astrophysical Journal

Coordinates 

Position (RA): 0 41 30.91
Position (Dec): -9° 15' 56.40"
Field of view: 2.69 x 1.80 arcminutes
Orientation: North is 84.8° left of vertical

Colours & filters 

Band	Wavelength	Telescope
Ultraviolet UV	275 nm	Hubble Space Telescope WFC3
Optical U	336 nm	Hubble Space Telescope WFC3 
Optical V	606 nm	Hubble Space Telescope WFC3
Optical I	814 nm	Hubble Space Telescope WFC3
Optical H-alpha	656 nm	Hubble Space Telescope WFC3
Optical H-alpha + NII	680 nm	Hubble Space Telescope WFC3
.
Date
Source https://esahubble.org/images/potw2309a/
Author ESA/Hubble & NASA, M. Gullieuszik
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Attribution: Credit:  ESA/Hubble & NASA, J. Dalcanton, Dark Energy Survey/DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA
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27 February 2023

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