Comment This constant assumption that dark matter is right (Score -1, Troll) 69
bothers me.
There is an unexplained phenomena and this "dark matter" and "dark energy" is just a made up explanation for that. There is no evidence it exists. No experiments we've done show that it exists and as far as I know there aren't even any proposed experiments that just need funding that are likely to show it exists.
Saying a galaxy is 99.9% something that we have no clue if even exists seems insane.
It's like string theory. Just made up stuff that is just tuned as needed to match measurements. It's like a god of the gaps - it's constantly adjusted to match experimental data.