41–50 of 84 posts
If the plasma jet is wildly larger than our entire galaxy, I wonder if some sort of exotic life could evolve inside the jet. Some sort of life that would be totally rare in the universe.
Sometimes I wonder if our whole universe is some kind of transient aberration, if you zoom out far enough
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Imagine the amount of energy required to create a jet that large! The scales are so big, it makes me wonder if there isn’t an upper limit to energy density. How much energy can be in one spot before you inadvertently create a Big Bang?
> it makes me wonder if there isn’t an upper limit to energy density Yes, in a sense. The point at which the energy bends space-time into a black hole.
The moment right after the big bang. As energy can never be created nor destroyed, all the energy in the universe was practically in one point in space-time a femtosecond after the big bang.
I thought that only hawking radiation could escape a black hole. Now a paper describing a vast jet of emitted plasma?? The article doesn't quite clarify this point. It mentions the jets shooting from below and above the black holes, but does this mean they're emerging from their interior or being created by the accretion of superheated material that forms in orbit around black holes? The article simple states this, w…
I've seen people say "you're not supposed to mention" downvotes if they happen to you, but when they're plainly stupid?
The jets are 23 million light years in length! That's 140 milky way galaxies laid out -- these are sizes I can't even begin to comprehend
Imagine a one meter long jet. Congratulations, you've begun to comprehend it and now are at 1/(2.176 × 1023) of the total length.
Earlier quoted context omitted.
> it makes me wonder if there isn’t an upper limit to energy density Yes, in a sense. The point at which the energy bends space-time into a black hole.
Actually, in theory there is one place denser but our models show it can never happen. The moment right after the big bang. As energy can never be created nor destroyed, all the energy in the universe was practically in one point in space-time a femtosecond after the big bang.
Earlier quoted context omitted.
Not my field, but could the Big Bang have been a massive black hole that "spat" out jets of plasma that formed into new stars and galaxies? I call this the black hole big burp theory.
This is very close to an idea known as "Black hole cosmology" -- basically the idea being that the visible universe is inside a black hole, leading to a sort of "nested multiverse". https://en.wikipedia.org/wiki/Black-hole_cosmology A related theory, rather than being inside a black hole, is that the other side of a black hole is a "white hole". As matter collapses into a black hole, it is emitted from the white hole…
Earlier quoted context omitted.
Actually, in theory there is one place denser but our models show it can never happen. The moment right after the big bang. As energy can never be created nor destroyed, all the energy in the universe was practically in one point in space-time a femtosecond after the big bang.
The whole concept of the Big Bang is a mind warp. The whole explosion must have happened in some… space-time thing to begin with. What was that immense point of matter and energy in? What was “around” it? We’ll never know.
If the plasma jet is wildly larger than our entire galaxy, I wonder if some sort of exotic life could evolve inside the jet. Some sort of life that would be totally rare in the universe.
Sometimes I wonder if our whole universe is some kind of transient aberration, if you zoom out far enough
Earlier quoted context omitted.
> it makes me wonder if there isn’t an upper limit to energy density Yes, in a sense. The point at which the energy bends space-time into a black hole.
Actually, in theory there is one place denser but our models show it can never happen. The moment right after the big bang. As energy can never be created nor destroyed, all the energy in the universe was practically in one point in space-time a femtosecond after the big bang.