No it doesn't exist, what exists is that the arms of spiral galaxies rotate around their galactic center and the luminosity of a spiral galaxy decreases as one goes from the center to the outskirts. So if luminous mass were all the matter, then we can model the galaxy as a point mass in the center and test masses orbiting around it, similar to the Solar System. From Kepler's Second Law, it is expected that the rotational velocities would decrease with distance from the center, similar to the Solar System. Fundamentally what exists is that this is not observed. Instead, the galaxy rotation curve remains flat as distance from the center increases. So, knowing little about gravity, we say there must be additional matter there to account for the rotational energy. However because we cannot see it, we called it 'Dark Matter'.I read someone say a paper was published very recently stating dark matter doesn't exist. I have not Googled it myself so might be BS.
Honestly its just a theory, I was referencing that we cannot account for how the universe works at very large or very small levels. Its wild how little we know about the human brain, the cosmos, and the fundamental forces and energy which make those up. And Yet, we ask the big questions and expect to receive a meaningful answer which isn't just some kind of metaphysical woo-woo. We cannot even put the questions into the right box of brain, cosmos, or quantum yet. We look to our brain to tell us about the smallest fundamentals, we look to the smallest fundamentals to tell us about the universe (dark matter and energy), and we look to the universe to tell us about our brain when it dies.
