A This is the most active place in the universe

AI Thread Summary
A recent discovery highlights a mega cluster of 14 galaxies that formed just 1.4 billion years after the Big Bang, showcasing the universe's early activity. This finding is compared to the previously known quasar ULAS J1342+0928, which existed 690 million years post-Big Bang and features a significant black hole. The presence of neutral hydrogen in ULAS J1342+0928 is noted as a key characteristic. The discussion emphasizes the ongoing revelations about the universe's structure and formation during its infancy. Such discoveries continue to reshape our understanding of cosmic evolution.
Astronomy news on Phys.org
This is hardly more surprising than the discovery of ULAS J1342+0928, which is largely composed of neutral hydrogen, contains an 800 million solar mass black hole, and existed 690 million years after the BB as discussed here; https://arxiv.org/abs/1803.08105, Chandra X-rays from the redshift 7.54 quasar ULAS J1342+0928.
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Thread 'Does it make sense to build new radio telescopes?'

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Thread 'Could gamma-ray bursts have an intragalactic origin?'

Thread 'Could gamma-ray bursts have an intragalactic origin?'

This is indirectly evidenced by a map of the distribution of gamma-ray bursts in the night sky, made in the form of an elongated globe. And also the weakening of gamma radiation by the disk and the center of the Milky Way, which leads to anisotropy in the possibilities of observing gamma-ray bursts. My line of reasoning is as follows: 1. Gamma radiation should be absorbed to some extent by dust and other components of the interstellar medium. As a result, with an extragalactic origin, fewer...
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Thread 'Our Beautiful Universe - Photos and Videos'

This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it less beautiful to me (n.b. the posts must of course comply with the PF guidelines, i.e. regarding science, only mainstream science is allowed, fringe/pseudoscience is not allowed). n.b. I start this...
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