Physicists in Germany have built the most accurate timepiece on Earth, achieving unprecedented levels of accuracy with a new atomic clock that keeps time according to the movements of ytterbium ions.
Called an optical single-ion clock, the device works by measuring the vibrational frequency of ytterbium ions as they oscillate back and forth hundreds of trillions times per second between two different energy levels. These ions are trapped within an ‘optical lattice’ of laser beams that allows scientists to count the number of ytterbium 'ticks’ per second to measure time so accurately, the clock won’t lose or gain a second in several billion years.
Until very recently, our most accurate time-keepers were caesium atomic clocks - devices that contain a 'pendulum’ of atoms that are excited into resonance by microwave radiation. It’s on these clocks that the official definition of the second - the Standard International (SI) unit of time - is based.
I guess you could say I dropped the base
Behold the most massive young galaxy cluster found in the early universe. How do these megastructures form? This newly discovered cluster, located 10 billion light years from Earth, gives us clues. Details here.
Credit: NASA’s Facebook Account
What a way to spend Christmas!
Did you know that “We’re With You When You Fly”? Thanks to our advancements in aeronautics, today’s aviation industry is better equipped than ever to safely and efficiently transport millions of passengers and billions of dollars worth of freight to their destinations. In fact, every U.S. Aircraft flying today and every U.S. air traffic control tower uses NASA-developed technology in some way. Here are some of our objectives in aeronautics:
Making Flight Greener
From reducing fuel emissions to making more efficient flight routes, we’re working to make flight greener. We are dedicated to improving the design of airplanes so they are more Earth friendly by using less fuel, generating less pollution and reducing noise levels far below where they are today.
Getting you safely home faster
We work with the Federal Aviation Administration to provide air traffic controllers with new tools for safely managing the expected growth in air traffic across the nation. For example, testing continues on a tool that controllers and pilots can use to find a more efficient way around bad weather, saving thousands of pounds of fuel and an average of 27 minutes flying time per tested flight. These and other NASA-developed tools help get you home faster and support a safe, efficient airspace.
Seeing Aviation’s Future
Here at NASA, we’re committed to transforming aviation through cutting edge research and development. From potential airplanes that could be the first to fly on Mars, to testing a concept of a battery-powered plane, we’re always thinking of what the future of aviation will look like.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com
Kim Goodsell was running along a mountain trail when her left ankle began turning inward, unbidden. A few weeks later she started having trouble lifting her feet properly near the end of her runs, and her toes would scuff the ground. Her back started to ache, and then her joints too.
This was in 2002, and Kim, then 44 years old, was already an accomplished endurance athlete. She cycled, ran, climbed and skied through the Rockies for hours every day, and was a veteran of Ironman triathlons. She’d always been the strong one in her family. When she was four, she would let her teenage uncles stand on her stomach as a party trick. In high school, she was an accomplished gymnast and an ardent cyclist. By college, she was running the equivalent of a half marathon on most days. It wasn’t that she was much of a competitor, exactly – passing someone in a race felt more deflating than energising. Mostly Kim just wanted to be moving.
So when her limbs started glitching, she did what high-level athletes do, what she had always done: she pushed through. But in the summer of 2010, years of gradually worsening symptoms gave way to weeks of spectacular collapse. Kim was about to head to Lake Superior with her husband. They planned to camp, kayak, and disappear from the world for as long as they could catch enough fish to eat. But in the days before their scheduled departure, she could not grip a pen or a fork, much less a paddle. Instead of a lakeside tent, she found herself at the Mayo Clinic in Rochester, Minnesota.
Continue Reading.
Gearing up for Thanksgiving weekend and desperate for small talk topics that make you sound slightly smarter? We’ve got you covered:
1. Tricks for building a Wi-Fi network that covers your entire house Excellent Wi-Fi coverage in your home may be easier to achieve than you might think—if you’ve got the right router placed in a central position, a Wi-Fi extender if needed, and a little bit of patience. via: BGR
2. The dream life of driverless cars Thanks to 3D scanning, driverless cars can do more than take you from one place to another: They can also produce artistic renditions of their surrounding environments, peculiarities and all. Talk about an IoT dream journal. via: The New York Times
3. Lego’s new digital system and other “toys-to-life” will be huge this holiday season Toys won’t only be played within the realm of a child’s imagination, but in mobile apps that can take physical toys into virtual spaces. via: @quartz
4. The dictionary, emoji, and redefining the word ‘word’ What do rent money, fart jokes, and student loans have in common? They all solicit a reaction that’s encapsulated in Oxford Dictionaries’ Word of the Year: the Face with Tears of Joy emoji. via: @theverge
DJI’s drone safety system has you signing up to fly in some areas