The ultra-faint dwarf galaxy Pegasus V (circled)

A unique ultra-faint dwarf galaxy has been discovered in the outer fringes of the Andromeda Galaxy thanks to the sharp eyes of an amateur astronomer examining archival data from the US Department of Energy-fabricated Dark Energy Camera on the Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory (CTIO) and processed by the Community Science and Data Center (CSDC). Follow-up by professional astronomers using the International Gemini Observatory revealed that the dwarf galaxy — Pegasus V — contains very few heavier elements and is likely to be a fossil of the first galaxies. All three facilities involved are Programs of NSF's NOIRLab.

Credit:

 International Gemini Observatory/NOIRLab/NSF/AURA
Acknowledgment: Image processing: T.A. Rector (University of Alaska Anchorage/NSF’s NOIRLab), M. Zamani (NSF’s NOIRLab) & D. de Martin (NSF’s NOIRLab)

About the Image

Id:noirlab2214b
Type:Artwork
Release date:June 30, 2022, 8 a.m.
Related releases:noirlab2214
Size:1992 x 1015 px

About the Object

Category:Galaxies

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BandWave-lengthTele-scope
Optical
g
475 nmGemini North
GMOS-N
Optical
g
475 nmGemini North
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630 nmGemini North
GMOS-N
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630 nmGemini North
GMOS-N