Mamta Ashar

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Solar Filament Eruption Creates 'Canyon of Fire': A magnetic filament of solar material erupted on the sun in late September, breaking the quiet conditions in a spectacular fashion. The 200,000 mile long filament ripped through the sun's atmosphere, the corona, leaving behind what looks like a canyon of fire. The glowing canyon traces the channel where magnetic fields held the filament aloft before the explosion. In reality, the sun is not made of fire, but of something called plasma: particles so hot that their electrons have boiled off, creating a charged gas that is interwoven with magnetic fields. These images were captured on Sept. 29-30, 2013, by NASA's Solar Dynamics Observatory, or SDO, which constantly observes the sun in a variety of wavelengths. Different wavelengths help capture different aspect of events in the corona. The red images shown in the movie help highlight plasma at temperatures of 90,000° F and are good for observing filaments as they form and erupt. The yellow images, showing temperatures at 1,000,000° F, are useful for observing material coursing along the sun's magnetic field lines, seen in the movie as an arcade of loops across the area of the eruption. The browner images at the beginning of the movie show material at temperatures of 1,800,000° F, and it is here where the canyon of fire imagery is most obvious. By comparing this with the other colors, one sees that the two swirling ribbons moving farther away from each other are, in fact, the footprints of the giant magnetic field loops, which are growing and expanding as the filament pulls them upward. Image Credit: NASA/Solar Dynamics Observatory #solar #sdo #nasa #space #sunpix #sun

Why do we sleep? To clean our brains, say US scientists

Scientists in the US claim to have a new explanation for why we sleep: in the hours spent slumbering, a rubbish disposal service swings into action that cleans up waste in the brain.<p>Through a series of experiments on mice, the researchers showed that during sleep, cerebral spinal fluid is pumped …

The Science And Psychology Behind What Drives Serial Entrepreneurs

By some counts, serial entrepreneurs are responsible for a third of all new businesses. Clemson management professor Wayne Stewart has studied their hearts and minds.<p>Ask any entrepreneur how much blood, sweat, tears (and soul) they’ve put into their startup, and you’d get an imprecise answer at …

US government shutdown: Dollar plunges to eight-month low

The dollar plummetted to an eight-month low against a basket of currencies on Tuesday, as a stand-off between the White House and America’s Republican party led the US government to shut down for the first time in 17 years.<p>Many economists and analysts had expected the two sides to broker a …

We're sorry, but we will not be posting updates to Instagram during the government shutdown. Also, all public NASA activities and events are cancelled or postponed until further notice. We'll be back as soon as possible. Sorry for the inconvenience.

Happy Friday #Wimbledon

Glow with the Flow: Researchers at NASA's Langley Research Center use all sorts of tools and techniques to learn more during the development of aircraft and spacecraft designs. In this photo, engineers led by researcher Greg Gatlin have sprayed fluorescent oil on a 5.8 percent scale model of a futuristic hybrid wing body during tests in the14 by-22-Foot Subsonic Wind Tunnel. The oil helps researchers "see" the flow patterns when air passes over and around the model. Those patterns are important in determining crucial aircraft characteristics such as lift and drag. Image Credit: NASA Langley/Preston Martin #aero #nasaaero #airplanes #windtunnel #testing #glowinthedark #langley #nasa #aeronautics

This image of the Earth shows us that we live on a dynamic, restless planet. On any given day, there is usually a cyclone, tropical depression, or extra-tropical storm brewing somewhere on the Earth. But for a brief moment this week, the skies over all of the oceans were relatively calm. This image is a composite of fourteen polar satellite passes, or swaths, stitched together from September 8, 2013. The natural-color images were acquired by the Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi National Polar-orbiting Partnership (Suomi NPP) satellite. At the time of those near-midday passes, there were no hurricanes, cyclones, or tropical storms in the Atlantic, Pacific, or Indian Ocean basins—a relatively rare occurrence at the height of the hurricane/cyclone season in the northern hemisphere. There was plenty of cloud cover, of course, and smaller storm systems. In the eastern Pacific, remnants of tropical storm Lorena were breaking up near the Baja Peninsula. In the eastern Atlantic, the pieces of tropical depression #9 were starting to gather near the islands of Cape Verde; by the next day, tropical storm Humberto would form. Image credit: NASA/NOAA/Suomi NPP/VIIRS #earth #hurricanes #cyclones #viirs #npp #planet #weather #tropicalweather #storms

Next stop, International Space Station! Orbital Sciences' Antares rocket, with the Cygnus cargo spacecraft aboard, is seen as it launches from Pad-0A of the Mid-Atlantic Regional Spaceport, Wednesday, Sept. 18, 2013, NASA Wallops Flight Facility, Virginia. Cygnus is on its way to rendezvous with the space station. The spacecraft will deliver about 1,300 pounds (589 kilograms) of cargo, including food and clothing, to the Expedition 37 crew. Photo Credit: (NASA/Bill Ingalls) #nasa #space #launch#rocketlaunch #iss #orbitalsciences #cygnus

Turn A Heart On And Off With The Flick Of A Switch

Stanford scientists are working on a light-controlled pacemaker.<p>A heartbeat is really a pretty magical thing. Every time that beautiful little hunk of muscle in your chest wants to send blood rushing around your body, it requires an electrical signal generated by your body to tell it to do so. This …

Almost healthy coconut chocolate brownies | The generous portion

My normal brownies are the fudgy, artery-clogging types that we all love but leave you feeling like a bit of a heffer. These are a lighter version …

Stephen Hawking: brain could exist outside body

Stephen Hawking has said he believes brains could exist independently of the body, but that the idea of a conventional afterlife is a fairy tale.<p>Speaking at the premiere of a documentary film about his life, the theoretical physicist said: "I think the brain is like a program in the mind, which is …

Oktoberfest has begun in Germany! The celebration of beer is held every year in Munich and draws a crowd of nearly 6 million people, making it the world’s largest fair. Festival-goers feast on traditional German foods and drink Oktoberfest beer, a special type of beer that must be brewed within the city limits of Munich. It’s estimated that during the 16-day celebration almost 7 million liters of beer are consumed. For more photos and videos from Oktoberfest, tap the blue location text above this image and browse the #oktoberfest hashtag. Photo by @viktoriagarvare