Here’s a Schwarzschild Black Hole, one “with mass, but with no electric charge, and no spin.” (Source)
5 things tagged “physics”
Best thing I’ve seen this year. About as spiritual as it gets.
After an unimaginable length of time, even the black holes will have evaporated and the universe will be nothing but a sea of photons, gradually tending towards the same temperature, as the expansion of the universe cools them towards absolute zero. Once the very last remnants of the very last stars are finally decayed away to nothing and everything reaches the same temperature, the story of the universe finally comes to an end. For the first time in its life, the Universe will be permanent and unchanging. Entropy finally stops increasing because the cosmos cannot get any more disordered.
Nothing happens. And it keeps not happening forever.
😢 how beautiful is that? And black holes take a long, long time to evaporate
A black hole with the mass of the sun will last a wizened 1067 years. Considering that the current age of our universe is a paltry 13.8 times 109 years, that’s a good amount of time. But if you happened to turn the Eiffel Tower into a black hole, it would evaporate in only about a day.
And that’s after this happens
It will take hundreds of trillions of years for the first stellar remnant to cool completely, fading from a white dwarf through red, infrared and all the way down to a true black dwarf. By that point, the Universe will hardly be forming any new stars at all, and space will be mostly black.
BLN and I spoke about how we simply have no good strategy to attempt a comprehension of “hundreds of trillions” of years.
Minute Physics on how Muons reaching terrestrial detectors from the upper atmosphere are direct proof of time dilation/length contraction in Special Relativity.
What a Boss 🙏 💯
When we arrived we were introduced to Henry Bethe, who is now five years old, but he was not at all impressed. The only thing he would say was “I want Dick. You told me Dick was coming,” and finally he had to be sent off to bed, since Dick (alias Feynman) did not materialise. About half an hour later, Feynman burst into the room, just had time to say “so sorry I’m late. Had a brilliant idea just as I was coming over,” and then dashed upstairs to console Henry. Conversation then ceased while the company listened to the joyful sounds above, sometimes taking the form of a duet and sometimes of a one-man percussion band.
In the evening I mentioned that there were just two problems for which the finiteness of the theory remained to be established; both problems are well-known and feared by physicists, since many long and difficult papers running to fifty pages and more have been written about them, trying unsuccessfully to make the older theories give sensible answers to them. When I mentioned this fact, Feynman said, “We’ll see about this,” and proceeded to sit down and in two hours, before our eyes, obtain finite and sensible answers to both problems. It was the most amazing piece of lightning calculation I have ever witnessed, and the results prove, apart from some unforeseen complication, the consistency of the whole theory.