Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror
DEAL: For $25 - Add A Second Phone Number To Your Smartphone for life! Use promo code SLASHDOT25. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. Check out the new SourceForge HTML5 Internet speed test! ×
Space

Astronomers Find Star Orbiting a Black Hole At 1 Percent the Speed of Light (sciencealert.com) 124

schwit1 writes: Astronomers have spotted a star whizzing around a vast black hole at about 2.5 times the distance between Earth and the Moon, and it takes only half an hour to complete one orbit. To put that into perspective, it takes roughly 28 days for our Moon to do a single lap around our relatively tiny planet at speeds of 3,683 km(2,288 miles) per hour. Using data from an array of deep space telescopes, a team of astronomers have measured the X-rays pouring from a binary star system called 47 Tuc X9, which sits in a cluster of stars about 14,800 light-years away. The pair of stars aren't new to astronomers -- they were identified as a binary system way back in 1989 -- but it's now finally becoming clear what's actually going on here. When a white dwarf pulls material from another star, the system is described as a cataclysmic variable star. But back in 2015, one of the objects was found to be a black hole, throwing that hypothesis into serious doubt. Data from Chandra has confirmed large amounts of oxygen in the pair's neighborhood, which is commonly associated with white dwarf stars. But instead of a white dwarf ripping apart another star, it now seems to be a black hole stripping the gases from a white dwarf. The real exciting news, however, is regular changes in the X-rays' intensity suggest this white dwarf takes just 28 minutes to complete an orbit, making it the current champion of cataclysmic dirty dancers. To put it in perspective, the distance between the two objects in X9 is about 1 million kilometers (about 600,000 miles), or about 2.5 times the distance from here to the Moon. Crunching the numbers, that's a journey of roughly 6.3 million kilometers (about 4 million miles) in half an hour, giving us a speed of 12,600,000 km/hr (8,000,000 miles/hr) - about 1 percent of the speed of light.

Comment Re:Feeding the Beast (Score 5, Interesting) 197

They own a lot of brands that USED to be great before EA bought them, and ran them into the ground. Before EA bought Bioware, I used to buy Bioware's games without knowing much about them because Bioware always made outstanding games. Since EA bought them, the quality of those games has went down the toilet, and I honestly doubt I'll buy the next dragon age game that comes out simply because DA 2 was complete shit. Honestly, it was the same with the Mass Effect games. Same with Maxis, and a dozen other brands.

Comment Re:How does their per-capita (Score 1) 473

Yeah, I'm the same way. I lived near Dallas, Texas for close to a decade, and the 100+ degree temps in the summer combined with high humidity was terrible. Like you, I'm living in OK with a more tolerable climate, and decent AC (it keeps my apartment cool during the summer), which is a challenge, since I keep a computer in just about every room, have an HTPC, and keep a reef aquarium (which releases TONS of heat into the room, thus requiring the AC to be on all day, even at work).

Comment Re:Fascist bloodlust (Score 3) 380

He didn't even try to work within the system, he went completely around it, which something that you just don't do in the military. He didn't even try to go up the chain of command. The inspector generals exist for a reason. And failing that, he could have gone all the way to the President if need be. Instead, he gave the documents to someone else - documents that he knew were classified, but had no idea just what was on them. He knew that they could contain information that put american lives at risk, as well as the lives of anyone working with the military.

Slashdot Top Deals

"The following is not for the weak of heart or Fundamentalists." -- Dave Barry

Working...