A2744 YD4

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Artist’s impression of the remote dusty galaxy A2744 YD4.jpg
This artist’s impression shows what A2744_YD4 might look like.[1]
Observation data (J2000 epoch)
Right ascension 00h 14m 24.927s[2]
Declination−30° 22′ 56.15″[2]
Redshift8.38 [3]
Distance13.2 billion ly (light-travel distance)
Other designations
[ZSM2014] YD4

A2744_YD4 is a very distant young galaxy. This galaxy has first been identified as a possible distant galaxy in 2015 using Hubble. This detection was made possible because this galaxy lies behind the massive galaxy cluster Abell 2744. In 2017, ALMA observed it and detected a small quantity of dust (the most distant stardust to date) and the first signature of Oxygen emitting light only 600 million years after the Big Bang [4].


  1. ^ "Artist's impression of the remote dusty galaxy A2744_YD4". www.eso.org. Retrieved 9 March 2017.
  2. ^ a b Zheng, W.; et al. (2014). "Young Galaxy Candidates in the Hubble Frontier Fields. I. Abell 2744" (PDF). The Astrophysical Journal. 795: 93. arXiv:1402.6743. Bibcode:2014ApJ...795...93Z. doi:10.1088/0004-637X/795/1/93.
  3. ^ Laporte, N.; Ellis, R. S.; Boone, F.; Bauer, F. E.; Quénard, D.; Roberts-Borsani, G. W.; Pelló, R.; Pérez-Fournon, I.; Streblyanska, A., ApJ, 2017, 837L, 21
  4. ^ "Ancient Stardust Sheds Light on the First Stars - Most distant object ever observed by ALMA". www.eso.org. Retrieved 9 March 2017.