Credit: Photo: DES/NOIRLab/NSF/AURA. Acknowledgments: Image processing: DES, Jen Miller (Gemini Observatory/NSF's NOIRLab), Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin. Image curation: Erin Sheldon, Brookhaven National Laborato
Caption: Shown here is the elliptical galaxy NGC 474 with star shells. Elliptical galaxies are characterized by their relatively smooth appearance as compared with spiral galaxies, one of which is to the left of NGC 474, which is oriented with South to the top and West to the left. The colorful neighboring spiral (NGC 470) has characteristic flocculent structure interwoven with dust lanes and spiral arms. NGC 474 is at a distance of about 31 megaparsecs (100 million light-years) from the sun in the constellation of Pisces. The region surrounding NGC 474 shows unusual structures characterized as 'tidal tails' or 'shells of stars' made up of hundreds of millions of stars. These features are likely due to recent (within the last billion years) mergers of smaller galaxies into the main body of NGC 474 or close passages of nearby galaxies, such as the NGC 470 spiral. For coordinate information, visit the NOIRLab webpage for this photo: https://noirlab.edu/public/news/noirlab2106a/.
Editor’s note: The DES second data release will be featured at the meeting of the American Astronomical Society. The session “NOIRLab’s Data Services: A Practical Demo Built on Science with DES DR2" takes place on Thursday, Jan. 14, 3:10-4:40 p.m. Central time. The session "Dark Energy Survey: New Results and Public Data Release 2" takes place on Friday, Jan. 15, 11 a.m.-12:30 p.m. Central time.
The Dark Energy Survey, a global collaboration including the Department of Energy&...