31–40 of 191 posts
What I don’t understand is where the material for the stars is coming from? Is there that much dust in deep space? Or did it collect it from the galaxy?
A galactic core has a lot of mass that could be stolen.
I wonder if this is an opportunity to detect intelligent life. If the black hole is affecting any intelligent life on the way, they might do something to save themselves or their planet, which might be detectable?
And what would we do if we saw it? It's likely beyond the cosmological horizon, meaning that a reply is impossible.
What's the speed of sound in intergalactic space, anyway?
Link to actual paper with actual images: https://iopscience.iop.org/article/10.3847/2041-8213/acba86
If you lived on a planet going around one of those stars it sure would be hard to make sense of the universe. "Oh I have it! In addition to all the incomprehensible things in the universe, we happen to live in a star system that is extremely, extremely rare and exeptional, unlike the rest of the universe!"
Earlier quoted context omitted.
I get incredibly frustrated with popular science articles that use only artist’s impressions and avoid the real images. To me, the real images are much more exciting. You don’t need fake clarity and fake colour when you’re seeing a (candidate) high speed black hole sucking the life out of some fricking ginormous balls of flaming nuclear fusion.
This article is even worse, that it shows an illustration without a caption identifying it as an illustration, which is very misleading. (Later they show it again with the caption saying it's an illustration.)
If you lived on a planet going around one of those stars it sure would be hard to make sense of the universe. "Oh I have it! In addition to all the incomprehensible things in the universe, we happen to live in a star system that is extremely, extremely rare and exeptional, unlike the rest of the universe!"
Before any of that is possible, a "Cambrian Explosion" is required. It may be that prokaryotic life is common, but the mitochondria and plastids of eukaryotes took a very long time to emerge (absent for more than half of the total habitable life of the earth).
Was it this billion years or that billion years
probability of our experience matching another planet’s experience in the same time frame is low
If you lived on a planet going around one of those stars it sure would be hard to make sense of the universe. "Oh I have it! In addition to all the incomprehensible things in the universe, we happen to live in a star system that is extremely, extremely rare and exeptional, unlike the rest of the universe!"
Before any of that is possible, a "Cambrian Explosion" is required. It may be that prokaryotic life is common, but the mitochondria and plastids of eukaryotes took a very long time to emerge (absent for more than half of the total habitable life of the earth).
Not an expert, but mitochondria didn't "emerge." Mitochondria co-evolved as bacteria, merged and became organelles through complex protein-import machinery and insertion into inner membranes of protein carriers for extracting energy for the host cell.
Earlier quoted context omitted.
Before any of that is possible, a "Cambrian Explosion" is required. It may be that prokaryotic life is common, but the mitochondria and plastids of eukaryotes took a very long time to emerge (absent for more than half of the total habitable life of the earth).
also, how long does it stay emerged Was it this billion years or that billion years probability of our experience matching another planet’s experience in the same time frame is low