Fan discovered a candidate galaxy for a dark or quasi-dark galaxy, since it is composed almost entirely of dark matter, it is about 300 million light years from Earth. It has a brightness of the few stars it has of around 6 million suns, that is almost ridiculous if we compare it with the brightness of the Milky Way, which has a brightness equivalent to tens of billions of times the brightness of the Sun, what happens is that this galaxy is composed of 99.99% dark matter, invisible to our eyes,
This has been known thanks to the globular clusters that act as satellites of this galaxy, so they have seen that there are globular clusters around this galaxy that in principle should not be there, but are there due to the incredible mass of dark matter that exists in this dark galaxy.
Additionally, they published a study on March 11, where they stated that our galaxy is wrapped in a pancake, it is not a good analogy, I have read the research and really the best analogy would be a Neapolitan pizza. because it turns out that what the researchers did was study the galaxies of the local group, they have studied about 31, the Andromeda and a few others, those that surround us, and that the edges of that sheet of dark matter that not only covers our galaxy, but also covers those 31 more galaxies of the local group, that layer of dark matter is enormous, it turns out that the edges are much thicker than the center and that is why those much thicker and denser edges of dark matter pull the galaxies towards the edges.
And this would explain a mystery of decades in astronomy and that is that astronomers did not explain why the galaxies of the local nucleus move away from us, yes, on a large scale in the universe everything moves away from everything, it is the expansion of the universe, but on a small scale of the local group, we are talking about the local group, it should not be like that, gravity should stop this expansion at a small level of the local group, that they move away from us is due precisely to that "pizza" of dark matter that surrounds us, where in the edges, dark matter is much denser.
We don't really know what dark matter is, there are theories, there are speculations, it is much more abundant than normal matter, in fact, there is about five times more dark matter than normal matter, if we do a calculation of everything in the universe, mass and energy, everything, normal matter, baryonic matter, which forms our bodies, our planet, the stars, etc., is between 4.9% and 5% of the total content. of the universe. Dark matter would be 26.8 to 27% of the total and dark energy, which is what makes the universe expand, would be 68% 70% of the total.
Black holes, normal ones, those with stellar mass, those that form when a massive star collapses, those are within normal matter, even supermassive ones would fall within normal matter, although we know that supermassive ones also eat dark matter. What could be a solution to dark matter would be the primordial black holes that supposedly all formed during the Big Bang.
These primordial black holes can have a mass of any mass, they can range from supermassive black holes to having the mass of the moon. and be very small, but they would fit into dark matter because they were created during the Big Bang, but just before the atoms emerged, therefore, they are not made up of atoms, they are made up of whatever matter existed at that time, call it strange matter, if you want.
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