I Black Holes: What They Are & What They're Made Of

AI Thread Summary
Black holes are regions in space where gravity is so strong that nothing, not even light, can escape. They are formed from the remnants of massive stars that have undergone gravitational collapse after exhausting their nuclear fuel. The core of a black hole is known as a singularity, surrounded by an event horizon that marks the point of no return. Current theories suggest that black holes are not made of traditional matter but rather consist of warped spacetime. For a deeper understanding, users are encouraged to explore existing threads on this topic.
Will K
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What are black holes made of?
 
Astronomy news on Phys.org
Will K said:
What are black holes made of?
There have been hundreds of threads, including a very recent one, on exactly that topic. I suggest a forum search (always a good idea for fundamental questions like this). A good place to start is the threads linked at the bottom of this page.
 

Thread 'Potential biosignature found in Mars rock'

Publication: Redox-driven mineral and organic associations in Jezero Crater, Mars Article: NASA Says Mars Rover Discovered Potential Biosignature Last Year Press conference The ~100 authors don't find a good way this could have formed without life, but also can't rule it out. Now that they have shared their findings with the larger community someone else might find an explanation - or maybe it was actually made by life.
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Thread 'Does it make sense to build new radio telescopes?'

TL;DR Summary: In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect alien signals, it will further expand the radius of the so-called silence (or rather, radio silence) of the Universe. Is there any sense in this or is blissful ignorance better? In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect...
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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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