Milky Way now believed to be much larger than before.
You don't need a degree in astrophysics to understand this one.
If the Milky Way is 165 quadrillion km across, supposedly having expanded from a small concentrated ball of matter around the time of the "Big Bang," then how did it expand to 150 thousand light years in diameter in "13.2" billion years (they claim it as the age of the universe) when astrophysicists say it was only expanding at light speed during the first few minutes of the "Big Bang." According to them, it would scarcely be expanding at all during the ensuing 15 billion years that followed. According to their calculations it should not exceed ten thousand light years in diameter.
Guess what their explanation is? You got it right. "Dark Matter" created sufficient mass inertia to make the Milky Way expand at the rate they required to fit their projections. So what is the mathematical figure associated with "Dark Matter" in how much it accelerates expansions? Whatever you want it to be. It is a magic number of something you can't see, measure or register on any instrument. It exists because scienmagists say if it didn't that would mean they are complete idiots.