Maybe someone could help me understand why a simple explanation for dark matter isn't possible.<p>I get how you can measure the mass of stars, and how you could also maybe measure the mass of interstellar gasses. You add it all up and there is missing mass. But how could you estimate the mass of larger objects? Couldn't the interstellar medium be full of moon sized cold rocks? You'd have no way to observe them on a galactic scale since they're not illuminated, they have effectively no absorption spectrum b/c of their small surface area and yet I'd think they could make up the difference you need for this "dark matter"<p>The explanation seems too simplistic, so I'm clearly missing something :)
Seems like they observed distortions of space time, but not seeing any (dark)matter?<p>Just for fun, what if matter actually has coordinates (x,y,z,h1,...,hn). Where hn is some number of hyper dimensions. Visible matter is stuck in our 3 space (x,y,z,0,...,0) and gravity is the only force that permeates across hyperspace. We can’t see the hypermatter except by the gravitational imprint it leaves on 3 space material.<p>If we had the ability, it’d be neat to see if our visible matter can alter the configuration of dark matter, just as dark matter seems to affect our visible matter.
In an infinite universe with random local density of matter, the gravitational constant would vary by location. Anyone know what the consensus is among astonomers if the universe is infinite or not ? Is there even a way to theoretically know ?