Astronomers have discovered a massive galaxy made almost entirely of dark matter. Called Dragonfly 44, the galaxy is basically 99.99 percent dark matter.
Dark Matter and Dark Energy
From dark energy and string theory to the end of the Universe, these are the unanswered cosmic conundra that are still baffling scientists.
The two largest pieces of the Universe that we know the least about, yet nothing less than the ultimate fate of the Universe will be determined by them. (Illustration: NASA/CXC/M.Weiss)
What Does Dark Energy Mean for the Fate of the Universe? | DiscoverMagazine.com
Einstein may have discovered dark energy without even realizing it
THE UNIVERSE CONSISTS OF 5 %VISIBLE MATTER 25% DARK MATTER 70% DARK ENERGY
IDC: Searching for Dark Energy in the HPC Universe
As for me, all the "dark" stuff is bullshit. I do NOT subscribe to these theories. It's all gravity, the forces of electromagnetism and nuclear reactions.
Everything You Need to Know About Dark Energy