In the early 1970s, people studying general relativity, our modern theory of gravity , noticed rough similarities between the properties of black holes and the laws of thermodynamics.
This speed limit can theoretically be exceeded if the matter is collapsing fast enough; the Basu and Das model suggests black holes were accreting matter at three times the Eddington rate for as long as the chain reaction was happening.
To pull it off, the Event Horizon Telescope team collaborated with scientists everywhere, arraying together several of the world's largest radio telescopes and turning the planet into one giant eye-on-the-far-away-sky. A mere 8,000 light years away in our home galaxy is another black hole, this one part of a binary star system called V404 Cygni.
Space Photos of the Week: Black Holes and Jellyfish Rainbows. This is a big week for space—including news from our local planets, crazy rockets from NASA making jellyfish rainbows in the sky, and oh, no big deal, just the first-ever photo of a black hole.
You can read her news story about the upcoming Uber IPO right here on WIRED .Also on this week’s pod, Mike, Lauren, and Arielle discuss the first photo of a black hole, the latest privacy concerns around Alexa devices, and some upcoming changes to Facebook’s News Feed.
The First Black Hole Photo, Facebook Changes, and More News. This may be good at stopping some of the viral fake news the platform has become famous for, but bad for the smaller outlets that have optimized their content specifically for Facebook.
This image shows the material around a super massive black hole in the center of a galaxy some 55 million light-years away. For the stuff around the black hole, it's not a visible light image.
The picture, taken over 5 days of observations in April 2017 using eight telescopes around the world by a collaboration known as the Event Horizon Telescope, depicts luminous gas swirling around a supermassive black hole at the center of M87, a galaxy 54 million light years away.
With my estimates, I get a dirt toss volume of 3.14 x 10-3 m3. Looking at the video, I get the following estimated times for one scoop:Dig time = 10 seconds. This puts the total dig time at 1.45 x 105 seconds or 40 hours.
A new study funded by NASA and the National Science Foundation used the distribution of dark matter in young galaxies to better understand what could have been feeding these dense objects so early on.
Just swap the labels on the tiles from numbers to up or down spins, and the puzzle becomes equivalent to a Nagaoka ferromagnet, with a hole that moves through a lattice of electrons.
Pinball in space: NASA’s Chandra X-ray Observatory found jets of particles and energy streaming from a black hole, only to run into a wall of gas and then bounce back toward the region they came from.
To turn the quasar off, all of that material would have to swirl inward and fall onto the black hole — a process that calculations and even observations suggest should take tens to hundreds of thousands of years.“There’s no way that the accretion should be able to shut down as quickly as we’ve seen it do,” said Paul Green, an astrophysicist at the Harvard-Smithsonian Center for Astrophysics.
The idea, first proposed in 2005 by Avery Broderick, now at the Perimeter Institute of Theoretical Physics and the University of Waterloo in Canada, and Avi Loeb of Harvard University, would explain why the black hole appears to flare.“It seems like they’ve got something really exciting here,” added astronomer Andrea Ghez, a longtime competitor to the European team at the University of California, Los Angeles.If these rotating flares are due to hot spots in the way that Broderick and Loeb imagined, additional flares will help reveal the black hole’s “spin,” a measure of its rotation.