What is dark matter and dark energy? by Kurzgesagt
Adam Rifkin stashed this in Science!
Stashed in: The Universe, Best Videos, Higgs Boson!, Physics, Dark Matter, Astrophysics, Astro, RSA Animate, Kurzgesagt
Fascinating.
1. Something is out there.
2. It interacts with gravity.
3. There is a lot of it.
Video makers have their own subreddit now, https://reddit.com/r/kurzgesagt
Very nice video, thanks Adam!
I have notice only one approximation that could be a mistake:
"[dark energy] is stronger that anything else we know" at 3:52
This is untrue and he said why himself before: inside galaxies, gravity dominates over "dark energy", that's why stars don't go away from each other.
There's also electromagnetic interaction that holds electrons to nuclei, and inside nuclei, strong and weak interactions that hold the stuff inside together. So these 3 interactions are also stronger than dark energy at the scales where they dominate.
And thanks Higgs for that! otherwise we would probably not be there to talk about it!
Good catch -- I wondered about that too, so your clarification helps!
They made this video, too:
http://pandawhale.com/post/65545/what-if-there-was-a-black-hole-in-your-pocket-by-kurzgesagt
And this one:
http://pandawhale.com/post/62683/the-fermi-paradox-where-are-all-the-aliens-by-kurzgesagt
11:01 AM Aug 06 2015