Illustris TNG is a theoretical astrophysics project that created the most detailed simulation of the universe to date, and it turns out that black holes influence the distribution of dark matter. Read the rest
Visible matter makes up only 5% of our universe, which is dominated by dark, unexplained forces.
Congrats on being one of the sparkly bits pic.twitter.com/8glPzOjp6k
— Katie Mack (@AstroKatie) January 18, 2018
From her 2014 article, The Dark Matter Poltergeist:
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So what do we know? We know dark matter is real—the evidence is overwhelming. Something must be responsible for the extra gravity messing with the motions of stars and galaxies. If that doesn’t convince you, you can look to gravitational lensing—the bending of light around massive objects. The presence of dark matter accounts for the way the light from distant stars and galaxies is distorted as it travels through the universe, following the gravitationally induced curving of space-time itself. If motion and lensing don’t convince you, look at the evidence that galaxies existed within a billion years of the Big Bang. Without dark matter as a kind of cosmic glue, galaxies would have taken much longer to form, as the gravity of gas and dust and stars had to fight against the pressure of all that matter colliding and heating up. Or just take a look at the Bullet Cluster. It’s the aftermath of a cosmic collision in which clusters of galaxies collided but the bulk of the matter passed right through the collision, in the way only ghostly dark matter could.
The world's most sophisticated security experts have been bombarded with recruiting offers from UAE-based company Darkmatter, which bills itself as a major state security contractor -- but people who've taken the bait say they were then told that they were being hired to weaponize huge arsenals of zero-day vulnerabilities so that the UAE can subject its own population to fine-grained, continuous surveillance. Read the rest
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At the bottom of a nickel mine near Sudbury, Ontario, scientists at one of the world's most sophisticated particle physics observatories are investigating one of the biggest mysteries of the cosmos: What is dark matter? Science correspondent Miles O'Brien helps to shed some light on the research at SNOLAB.
The fun thing about the Nobel Prize in Physics is watching pundits try to explain to the public the research that won. It doesn't always go well. Physics is not, shall we say, the public's best subject. (And I include myself in that "public".) Beyond that, words that describe legitimate concepts in physics have taken on new, more fantastical meanings in science fiction, which only serves to confuse people further.
That's why I like this video produced by KQED Science. It features Lawrence Berkeley Lab astrophysicist Saul Perlmutter, one of the winners of this year's Nobel Prize in Physics, and does a nice job of explaining what "dark energy" really is, why work with dark energy is worthy of a Nobel, and what Perlmutter and his colleagues have contributed to the expansion of human knowledge.