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Eighty-three supermassive black holes found in the distant universe

Eighty-three supermassive black holes found in the distant universe

Science
March 13 (UPI) -- Astronomers have discovered 83 new supermassive black holes in the distant universe, or early universe, representing a time when the university was less than 2 billion years old. Researchers were surprised to find so many quasars, glowing galactic nuclei powered by supermassive central black holes, in the early universe, just a few hundred million years after the Big Bang. "Understanding how black holes can form in the early universe, and just how common they are, is a challenge for our cosmological models," Michael Strauss, a professor of astrophysical sciences at Princeton University, said in a news release. Scientists found the quasars using the Subaru Telescope's Hyper Suprime-Cam. The telescope, which is operated by the National Astronomical Observatory of Japan, i...
Security holes found in big brand car alarms

Security holes found in big brand car alarms

Technology
Media playback is unsupported on your device Security flaws in three specialist car alarms have left vehicles vulnerable to being stolen or hijacked, say researchers.The bugs were found in alarm apps by Clifford, Viper, and Pandora. The alarms are on three million vehicles.The security researchers exploited the bugs to activate car alarms, unlock a vehicle's doors and start the engine via an insecure app. The expose has prompted the firms to upgrade security to remove the flaws.Alarms 'unhackable'The research was carried out for the BBC's Click technology programme by security consultants Pen Test Partners, which has a long track record of uncovering software flaws. The firm focussed on two well-known firms that produce alarms that can be acce...
New foldable drone can navigate narrow holes

New foldable drone can navigate narrow holes

Science
Dec. 12 (UPI) -- Drones can be used to explore environs too difficult and dangerous for humans to navigate, like a burned out building or the rubble of a collapsed bridge. But often, entrances to and passageways through these environments are quite small -- holes and cracks measuring just a few inches wide. Engineers at the University of Zurich have developed a foldable drone that can shrink itself to fit through small holes. The technology could help drones navigate tight confines during search and rescue missions in the wake of a disaster. Inspired by birds, which can fold their wings mid-flight, Swiss engineers built a drone that can fold its arms in order to fly through small spaces without sacrificing aerial stability. Researchers described their new technology in the journal IEEE Ro...
Dozen black holes found at galactic centre

Dozen black holes found at galactic centre

Science
A dozen black holes may lie at the centre of our galaxy, the Milky Way, researchers have said.A new analysis provides support for a decades-old prediction that "supermassive" black holes at the centres of galaxies are surrounded by many smaller ones.However, previous searches of the Milky Way's centre, where the nearest supermassive black hole is located, have found little evidence for this.Details appear in the journal Nature.Charles Hailey from Columbia University in New York and colleagues used archival data from Nasa's Chandra X-ray telescope to come to their conclusions.They report the discovery of a dozen inactive and low-mass "binary systems", in which a star orbits an unseen companion - the black hole.The supermassive black hole at the centre of the Milky Way, known as Sagittarius ...
Milky Way center may host 13 black holes

Milky Way center may host 13 black holes

Science
April 4 (UPI) -- Models predict the supermassive black holes found at the center of most galaxies will be surrounded by a sizable population of smaller black holes. But, until now, astronomers haven't been able to find extra black holes at the center of the Milky Way.A new study, however, published this week in the journal Nature, suggests at least 13 black holes are positioned near Sagittarius A, the Milky Way's supermassive black hole.In fact, the research suggests thousands of black holes could be sprinkled throughout the inner regions of the galaxy."There are only about five dozen known black holes in the entire galaxy -- 100,000 light years wide -- and there are supposed to be 10,000 to 20,000 of these things in a region just six light years wide that no one has been able to find," Ch...