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On Aug. 24, 2014, the sun emitted a mid-level solar flare, peaking at 8:16 a.m. EDT. NASA's Solar Dynamics Observatory captured images of the flare, which erupted on the left side of the sun. Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, however -- when intense enough -- they can disturb the atmosphere in the layer where GPS and communications signals travel. This flare is classified as an M5 flare. M-class flares are ten times less powerful than the most intense flares, called X-class flares. Pictured here is a close-up of a moderate flare on Aug. 24, 2014, shows light in the 131 and 171 Angstrom wavelengths. The former wavelength, usually colorized in teal, highlights the extremely hot material of a flare. The latter, usually colorized in gold, highlights magnet loops in the sun's atmosphere. Image Credit: NASA/SDO #nasa #sun #solarflare #sdo #solardynamics #space; -
25 Years Ago, Voyager 2 Captures Images of Neptune NASA's Voyager 2 spacecraft gave humanity its first glimpse of Neptune and its moon Triton in the summer of 1989. This picture of Neptune was produced from the last whole planet images taken through the green and orange filters on the Voyager 2 narrow angle camera. The images were taken on Aug. 20, 1989, at a range of 4.4 million miles from the planet, 4 days and 20 hours before closest approach on Aug. 25. The picture shows the Great Dark Spot and its companion bright smudge; on the west limb the fast moving bright feature called "Scooter" and the little dark spot are visible. These clouds were seen to persist for as long as Voyager's cameras could resolve them. North of these, a bright cloud band similar to the south polar streak may be seen. In the summer of 2015, another NASA mission to the farthest zone of the solar system, New Horizons, will make a historic first close-up study of Pluto. Although a fast flyby, New Horizons' Pluto encounter on July 14, 2015, will not be a replay of Voyager but more of a sequel and a reboot, with a new and more technologically advanced spacecraft and, more importantly, a new cast of characters. Those characters are Pluto and its family of five known moons, all of which will be seen up close for the first time next summer. Image Credit: NASA #nasavoyager #neptune #solarsystem #nasa #space #voyager #newhorizons; -
The six-person Expedition 40 crew of the International Space Station wrapped up the week Friday with more biomedical research, computer upgrades and some final closeout activities following Monday’s Russian spacewalk. In the U.S. segment of the station, the astronauts conducted biomedical studies designed to track the effects of weightlessness on the human body and develop countermeasures to keep the crew healthy. On the Russian side of the complex, Skvortsov and Artemyev returned Pirs to its normal configuration in the wake of Monday’s five-hour, 11-minute spacewalk from the Pirs airlock. During that excursion, Skvortsov and Artemyev manually deployed a Peruvian nanosatellite and installed and retrieved science packages on the station’s exterior. Skvortsov and Artemyev also took some time in the morning to conduct a study of the veins in their lower legs. Seen here are unoccupied Russian Orlan spacesuits for Russian cosmonauts Oleg Artemyev (blue stripes) and Alexander Skvortsov (red stripes), both Expedition 40 flight engineers, in the Pirs Docking Compartment of the International Space Station on the eve of the spacewalk that occurred on Aug. 18, 2014. Image credit: NASA #nasa #iss #spacesuits #spacewalk #eva #spacestation; -
Hubble Sees a Silver Needle in the Sky: This stunning new image from the Hubble Space Telescope shows part of the sky in the constellation of Canes Venatici (The Hunting Dogs). Although this region of the sky is not home to any stellar heavyweights, being mostly filled with stars of average brightness, it does contain five Messier objects and numerous intriguing galaxies - including NGC 5195, a small barred spiral galaxy considered to be one of the most beautiful galaxies visible, and its nearby interacting partner the Whirlpool Galaxy (heic0506a). The quirky Sunflower Galaxy is another notable galaxy in this constellation, and is one of the largest and brightest edge-on galaxies in our skies. Credit: NASA & ESA, Acknowledgement: Roelof de Jon #nasa #esa #hubble #hst #space #astronomy #galaxy #science; -
Taking a walk in space: The six-person Expedition 40 crew of the International Space Station wrapped up the week Friday with more biomedical research, computer upgrades and some final closeout activities following Monday’s Russian spacewalk. In this image, Russian cosmonauts Oleg Artemyev (blue stripes) and Alexander Skvortsov (red stripes, partially obscured), attired in Russian Orlan spacesuits, participate in an Aug. 18 spacewalk outside the space station. Image Credit: NASA #iss #nasa #spacestation #space #spacewalk #roscosmos #exp40;
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Supernova Seen In Two Lights: The destructive results of a mighty supernova explosion reveal themselves in a delicate blend of infrared and X-ray light, as seen in this image from our Spitzer Space Telescope and Chandra X-Ray Observatory, and the European Space Agency's XMM-Newton. The bubbly cloud is an irregular shock wave, generated by a supernova that would have been witnessed on Earth 3,700 years ago. The remnant itself, called Puppis A, is around 7,000 light-years away, and the shock wave is about 10 light-years across. The pastel hues in this image reveal that the infrared and X-ray structures trace each other closely. Credit: NASA/ESA/JPL-Caltech/GSFC/IAFE #nasa #supernova #space #spitzer #chandra #xray #astronomy #science; -
Of all the planets we've explored, none have matched the dynamic complexity of our own. Earth is constantly changing, and we're working constantly to explore and understand the planet on scales from local to global. The time-lapse video shows the VIIRS composite for the eastern hemisphere from January 18 to July 25, 2014. Subtle changes in the snow and vegetation cover of the land vie for attention with a dynamic, swirling layer of clouds that are constantly present and constantly moving. Credit: NASA #earth #earthrightnow #nasa #space #science; -
While not photon torpedoes, Astronaut Reid Wiseman shared this video of two small satellites being deployed from the International Space Station. The pair of Planet Labs Dove satellites were deployed Tuesday, August 19, 2014 in the first of the latest series of NanoRacks CubeSat deployments from the station. By next Monday, 16 CubeSats out of the 28 on tap for this series are expected to be deployed from the station. The CubeSats were among the nearly 3,300 pounds of science and supplies delivered to the station in July by Orbital Sciences’ Cygnus cargo vehicle. Image Credit: NASA; -
Retreating Glacier: Located in the Brabazon Range of southeastern Alaska, Yakutat Glacier is one of the fastest retreating glaciers in the world. It is the primary outlet for the 810-square kilometer (310-square mile) Yakutat ice field, which drains into Harlequin Lake and, ultimately, the Gulf of Alaska. The Operational Land Imager on the Landsat 8 satellite captured this image of the glacier and lake on Aug. 13, 2013. Snow and ice appear white and forests are green. The brown streaks on the glaciers are lateral and medial moraines. Over the past 26 years, the glacier’s terminus has retreated more than 5 kilometers (3 miles). What is causing the rapid retreat? University of Alaska glaciologist Martin Truffer and colleagues pointed to a number of factors in their 2013 study published in the Journal of Glaciology. The chief cause is the long-term contraction of the Yakutat Ice Field, which has been shrinking since the height of the Little Ice Age. Image Credit: NASA Earth Observatory image by Robert Simmon, using Landsat data from the U.S. Geological Survey #earth #earthrightnow #climatechange #ice #glacier #nasa #science; -
Dancing Auroras! Astronaut Reid Wiseman on the International Space Station snapped with image of auroras over Earth and stated, "Never in my wildest dreams did I imagine this." The dancing lights of the aurora provide spectacular views on the ground and from the space station, but also capture the imagination of scientists who study incoming energy and particles from the sun. Aurora are one effect of such energetic particles, which can speed out from the sun both in a steady stream called the solar wind and due to giant eruptions known as coronal mass ejections. Image Credit: NASA #iss #aurora #exp40 #spacestation #space #nasa;
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The launch of more miniature satellites and cleanup activities were the focus of activities Tuesday aboard the orbiting International Space Station. This image is of a pair of Planet Labs Dove satellites that were deployed Tuesday in the first of the latest series of NanoRacks CubeSat deployments from the space station. Image Credit: NASA #nasa #space #spacestation #iss #exp40 #satellite #cudesat #science; -
Testing Electric Propulsion: On August 19, National Aviation Day, a lot of people are reflecting on how far aviation has come in the last century. Could this be the future – a plane with many electric motors that can hover like a helicopter and fly like a plane, and that could revolutionize air travel? Engineers at NASA's Langley Research Center in Hampton, Va., are studying the concept with models such as the unmanned aerial system GL-10 Greased Lightning. The GL-10, which has a 10-foot wingspan, recently flew successfully while tethered. Free-flight tests are planned in the fall of 2014. Today, share your first flight experience with images and stories using #myfirstflight. Image Credit: NASA Langley/David C. Bowman #nasa #nationalaviationday #nasaaero #aeronautics; -
National Aviation Day is today! We're remembering 'first flights.' Share yours on social media with stories and images using #myfirstflight. In honor of the Wright brother's first flight, President Franklin Roosevelt declared in 1939 that Aug. 19, Orville Wright's birthday, would be National Aviation Day - an annual occasion to celebrate the importance of aviation. In this photo, research pilot Denis Steele sets up a camera in the cockpit of an ER-2 aircraft at 65,000 feet over the Alaskan mountains. Image Credit: NASA / Denis Steele #nasa #nationalaviationday #nasaaero #aeronautics; -
Curiosity's Brushwork on Martian 'Bonanza King' Target: Our Curiosity Mars rover used the Dust Removal Tool on its robotic arm to brush aside reddish, more-oxidized dust, revealing a gray patch of less-oxidized rock material at a target called "Bonanza King," visible in this image from the rover's Mast Camera. The rover team is evaluating Bonanza King as a possible drilling target. The mission has previously drilled into three target rocks to collect sample powder for analysis by the rover's onboard laboratory instruments. Image Credit: NASA/JPL-Caltech/MSSS #nasa #mars #marscuriosity #marsrover #planets #science; -
Ring King: Saturn reigns supreme, encircled by its retinue of rings. Although all four giant planets have ring systems, Saturn's is by far the most massive and impressive. Scientists are trying to understand why by studying how the rings have formed and how they have evolved over time. This view looks toward the sunlit side of the rings from about 37 degrees above the ringplane. The image was taken with the Cassini spacecraft wide-angle camera on May 4, 2014 using a spectral filter which preferentially admits wavelengths of near-infrared light centered at 752 nanometers. Credit: NASA/JPL-Caltech/Space Science Institute #nasa #saturn #cassini #space planets #science;
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