By Soulskill from Slashdot's answers-in-the-gamma-quadrant department
An anonymous reader writes: Like initials carved in a tree, ER = EPR, as the new idea is known, is a shorthand that joins two ideas proposed by Einstein in 1935. One involved the paradox implied by what he called "spooky action at a distance" between quantum particles (the EPR paradox, named for its authors, Einstein, Boris Podolsky and Nathan Rosen). The other showed how two black holes could be connected through far reaches of space through "wormholes" (ER, for Einstein-Rosen bridges). At the time that Einstein put forth these ideas — and for most of the eight decades since — they were thought to be entirely unrelated.
But if ER = EPR is correct, the ideas aren't disconnected — they're two manifestations of the same thing. And this underlying connectedness would form the foundation of all space-time. Quantum entanglement — the action at a distance that so troubled Einstein — could be creating the "spatial connectivity" that "sews space together," according to Leonard Susskind, a physicist at Stanford University and one of the idea's main architects. Without these connections, all of space would "atomize," according to Juan Maldacena, a physicist at the Institute for Advanced Study in Princeton, N.J., who developed the idea together with Susskind. "In other words, the solid and reliable structure of space-time is due to the ghostly features of entanglement," he said. What's more, ER = EPR has the potential to address how gravity fits together with quantum mechanics.Read Replies (0)
By Soulskill from Slashdot's keeping-them-small-enough-to-govern department
An anonymous reader writes: Confirming speculation from yesterday, Comcast announced this morning that its attempt to merge with Time Warner Cable has been terminated. The announcement was very brief, but indicated that regulatory pressure was the reason they killed the deal. CEO Brian Roberts said, "Today, we move on. Of course, we would have liked to bring our great products to new cities, but we structured this deal so that if the government didn't agree, we could walk away." The Washington Post adds, "The move by regulators to throw up roadblocks shows that the government has grown concerned about massive media conglomerates bigfooting rivals that are finding success by streaming content over the Internet, analysts said. And after years of approving a wave of mergers in the industry — including that of Comcast and NBC Universal in 2011 — federal officials are taking a new tone, they said."Read Replies (0)
Hubble Turns 25
Posted by News Fetcher on April 24 '15 at 05:00 AM
By Soulskill from Slashdot's thanks-for-all-the-desktop-wallpapers department
points out that the Hubble Space Telescope turns 25 today.Hubble was launched on April 24, 1990, aboard the Space Shuttle Discovery from Kennedy Space Center, Florida. Currently, it is flying about 340 miles over the Earth and circling us every 97 minutes. While the telescope itself is not really much to look at, that silver bucket is pure gold for astronomers. Scientists have used that vantage point to make ground-breaking observations about planets, stars, galaxies and to reveal parts of our universe we didn't know existed. The telescope has made more than a million observations and astronomers have used Hubble data in more than 12,700 scientific papers, "making it one of the most productive scientific instruments ever built," according to NASA. ... NASA aims to keep Hubble operating through at least 2020 so that it can overlap with its successor. The James Webb Space Telescope is due to launch in October 2018 and begin observations in mid-2019.
NASA celebrated by releasing a new, epic image from Hubble titled "Celestial Fireworks
." It is accompanied by an impressive flythrough video
. Some nice galleries of Hubble images have been put together at the NY Times
, but a bigger collection is available
directly from the official Hubble website.Read Replies (0)
By timothy from Slashdot's I-know-some-people-who-should-vacation-there department
The Washington Post reports that the "supervolcano" beneath Yellowstone National Park (which, thankfully, did not kill us all in 2004
, or in 2008
) may be more dangerous when it does erupt than anyone realized until recently. Scientists have today published a paper documenting their discovery of an even
larger, deeper pool of magma below the already huge reservoir near the surface
. From the article:On Thursday, a team from the University of Utah published a study, in the journal Science that for the first time offers a complete diagram of the plumbing of the Yellowstone volcanic system.
The new report fills in a missing link of the system. It describes a large reservoir of hot rock, mostly solid but with some melted rock in the mix, that lies beneath a shallow, already-documented magma chamber. The newly discovered reservoir is 4.5 times larger than the chamber above it. There's enough magma there to fill the Grand Canyon. The reservoir is on top of a long plume of magma that emerges from deep within the Earth's mantle. ...
< article continued at Slashdot
>Read Replies (0)