Yet more mysteries of cosmology. I’d like to see what readers theories are for the cause of this. Here’s one I’ve been thinking of. First of all, note that just because WE are not the center of the universe does not mean there can not BE a center of the universe. I mean, just like we found the Earth was not the center of the Solar System with all the planets revolving around it, didn’t mean there could not be a center of the Solar System, the Sun, with the planets revolving around it, instead. So what I think this is indicating is a preferred frame of the universe. There is no logical reason ..read more

Hey, I’m a layman when it comes to cosmology, but there’s a question that makes me wonder: why does the formation of the milky way come before the formation of the oldest black hole we know? Wasn’t it thanks to the black holes at the center of every galaxy that a galaxy was actually formed? As you can see in this wikipedia article: https://en.wikipedia.org/wiki/Chronology_of_the_universe As i said, i'm a layman so sorry if my way of thinking sounds stupid. (Using Reverso Text) submitted by /u/Augooosto [visit reddit] [comments ..read more

A very massive charged black hole could reach a near-extremal state in the right conditions supressing the rate of emission of Hawking radiation (https://physics.stackexchange.com/questions/490524/evaporation-of-large-charged-black-holes) Meanwhile, the radiation emitted by a black hole can be confined through various mechanisms like massive fields, magnetic fields, anti-de Sitter boundaries or nonlinear interactions (arxiv.org/abs/1501.06570). This confined radiation could return to the black hole. Applied to Hawking radation this would mean that the black hole would not lose its mass to thi ..read more

I just heard that there are some unexpected signs of a structure (multipoles) in data on the cosmic microwave background. I'd like to do some experimenting to see if I can see these structures in the data by data analysing of my own. How can I get the file with data (with data emanating form the galaxy removed as well as possible)? It's easy to get a picture, but I would like to have the actual data in the form of a function from a sphere in some coordinates. There will be a dipole component to the data which should be irrelevant, if there is data with that component removed, even better. But ..read more

Would a change in perspective change the CMB at all? I imagine it would be essentially the same if observed from the Andromeda Galaxy, but if we instantaneously travel to a location 10 billion light years away would the patterns of hot and cold spots in the CMB change at all? How far away would your perspective have to be to expect a change? submitted by /u/For_Fox_Creek [visit reddit] [comments ..read more

submitted by /u/Competitive_Travel16 [visit reddit] [comments ..read more

So much money and intellectual resources are deployed trying to answer the question. What will change when we finally agree on the answer? Maybe we should agree to disagree, move on, and ask a different question. submitted by /u/Mazmul [visit reddit] [comments ..read more

submitted by /u/fchung [visit reddit] [comments ..read more

OK reddit, thought experiment. Let's say a particle is in a stable, circular orbit of a black hole, just beyond the event horizon. While this is happening, the black hole consumes some other matter, and the event horizon expands, just enough to engulf the orbiting particle. Would the particle remain orbiting the centre of the black hole as before, just inside the event horizon? Or is there now a different regime of physics or gravity that would cause the particle to fall into centre of the black hole, and join the (maybe) singularity? submitted by /u/Stolen_Sky [visit reddit] [comments ..read more

I tried asking this before, but people didn't get what I was asking, so I will try again. The temperature in a black hole should approach the plank temperature as all the particles entering the black hole are torn apart by spaghettification and compressed into the smallest possible area, which approaches the plank length. As this happens, atomic bonds will be torn apart, and protons and neutrons will melt into a quark-gluon plasma. But what happens to the quark-gluon plasma as the temperature and pressure increase? Will the quarks, leptons and bosons melt into very high-energy quantum fields ..read more