It’s been a good few weeks for detect distant objects in the universe. Equal Forbes NoteJapanese researchers have detect what may be the most distant galaxy known to date. HD1 is far enough away that its light is estimated to be 13.5 billion years old, just 300 million years after the Big Bang. That makes it 100 million years older than previous record holderGN-z11, and suggests that it may have had some of the first stars (Population III) to appear during reionization after the “dark ages” of the universe.
The team that discovered HD1 used about 1,200 hours of observations between Spitzer . Space Telescope, Subaru Telescope, the UK Infrared Telescope and the VISTA Telescope. They verified the distance using Large millimeter/millimetre array Atacamaand the red is indicative of the intense redshift you would expect from a galaxy very far away.
Astronomers still want to double-check their results. Signals from HD1 have a significance level of 99.9 percent, but observers won’t be sure until they have a significance level of 99.999 percent or higher. Researchers can get that opportunity when James Webb . Space Telescope look at the galaxy using sensors that focus on its infrared rays.
If scientists can confirm the existence of HD1, that will raise countless questions. HD1 does not easily fit existing models of galaxy formation, and shows that there were extremely bright objects in the early universe. Not that the astronomy community will mind – this will help refine their cosmological models.
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