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Rosetta Comet Fires Its Jets: The four images that make up this montage of comet 67P/Churyumov-Gerasimenko were taken on Sept. 26, 2014 by the European Space Agency's Rosetta spacecraft. At the time, Rosetta was about 16 miles (26 kilometers), from the center of the comet. In the montage, a region of jet activity can be seen at the neck of the comet. These jets, originating from several discrete locations, are a product of ices sublimating and gases escaping from inside the nucleus. The overlapping and slightly dissimilar angles of the four images that compose the montage are a result of the combined effect of the comet rotating between the first and last images taken in the sequence (about 10 degrees over 20 minutes), and the spacecraft movement during that same time. Image Credit: ESA/Rosetta/NAVCAM #nasa #esa #space #comet #cometwatch #67p #science; -
Solar Flare! Our Solar Dynamics Observatory captured this image of a solar flare on Oct. 2, 2014. The solar flare is the bright flash of light on the right limb of the sun. A burst of solar material erupting out into space can be seen just below it. 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. Image Credit: NASA/SDO #nasa #space #sun #solarflare #sdo #earth #spaceweather #science; -
Thowback Thursday: Mission Specialist Bruce McCandless II ventured further away from the confines and safety of his ship than any previous astronaut ever has. This space first was made possible by the Manned Manuevering Unit or MMU, a nitrogen jet propelled backpack. After a series of test maneuvers inside and above Challenger's payload bay, McCandless went "free-flying" to a distance of 320 feet away from the Orbiter. The MMU is controlled by joy sticks positioned at the end of the arm rests. Moving the joy sticks left or right or by pulling them fires nitrogen jet thrusters propelling McCandless in any direction he chooses. A still camera is mounted on the upper right portion of the MMU. This stunning view shows McCandless with the MMU out there amongst the black and blue of Earth and space. Image Credit: NASA Taken: 02/11/1984 #TBT #space #history #NASA #freeflying #nasahistory; -
We're 56 years old today! Founded today in 1958, we work to reach for new heights & reveal the unknown. Since our inception, NASA has accomplished many great scientific and technological feats in air and space. NASA technology also has been adapted for many nonaerospace uses by the private sector. NASA remains a leading force in scientific research and in stimulating public interest in aerospace exploration, as well as science and technology in general. Perhaps more importantly, our exploration of space has taught us to view Earth, ourselves, and the universe in a new way. While the tremendous technical and scientific accomplishments of NASA demonstrate vividly that humans can achieve previously inconceivable feats, we also are humbled by the realization that Earth is just a tiny "blue marble" in the cosmos. Image credit: NASA #nasa #nasahistory #happybirthday #otd #space #history; -
Mega Flares from a Mini Star: On April 23, our Swift satellite detected the strongest, hottest, and longest-lasting sequence of stellar flares ever seen from a nearby red dwarf star. The initial blast from this record-setting series of explosions was as much as 10,000 times more powerful than the largest solar flare ever recorded. DG CVn, a binary consisting of two red dwarf stars shown here in an artist's rendering, unleashed a series of powerful flares seen by Swift. At its peak, the initial flare was brighter in X-rays than the combined light from both stars at all wavelengths under typical conditions. Image Credit: NASA's Goddard Space Flight Center/S. Wiessinger #nasa #sun #solarflare #stars #xray #swift #reddwarf #science;
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Shrinking Aral Sea In the 1960s, the Soviet Union undertook a major water diversion project on the arid plains of Kazakhstan, Uzbekistan, and Turkmenistan. The region’s two major rivers, fed by snowmelt and precipitation in faraway mountains, were used to transform the desert into farms for cotton and other crops. Before the project, the Syr Darya and the Amu Darya rivers flowed down from the mountains, cut northwest through the Kyzylkum Desert, and finally pooled together in the lowest part of the basin. The lake they made, the Aral Sea, was once the fourth largest in the world. Although irrigation made the desert bloom, it devastated the Aral Sea. This series of images from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite documents the changes. At the start of the series in 2000, the lake was already a fraction of its 1960 extent (black line). The Northern Aral Sea (sometimes called the Small Aral Sea) had separated from the Southern (Large) Aral Sea. The Southern Aral Sea had split into eastern and western lobes that remained tenuously connected at both ends. By 2001, the southern connection had been severed, and the shallower eastern part retreated rapidly over the next several years. Especially large retreats in the eastern lobe of the Southern Sea appear to have occurred between 2005 and 2009, when drought limited and then cut off the flow of the Amu Darya. Water levels then fluctuated annually between 2009 and 2014 in alternately dry and wet years. Dry conditions in 2014 caused the Southern Sea’s eastern lobe to completely dry up for the first time in modern times. In a last-ditch effort to save some of the lake, Kazakhstan built a dam between the northern and southern parts of the Aral Sea. Completed in 2005, the dam was basically a death sentence for the southern Aral Sea, which was judged to be beyond saving. All of the water flowing into the desert basin from the Syr Darya now stays in the Northern Aral Sea. Between 2005 and 2006, the water levels in that part of the lake rebounded significantly and very small increases are visible throughout the rest of the time period.; -
Fall Colors Arriving A few days after autumn showed up on the calendar in the Northern Hemisphere, it showed up on the landscape of North America. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite captured this view of fall colors around the Great Lakes on Sept. 26, 2014. The changing of leaf color in temperate forests involves several causes and reactions, but the dominant factors are sunlight and heat. Since temperatures tend to drop sooner and sunlight fades faster at higher latitudes, the progression of fall color changes tends to move from north to south across North America from mid-September through mid-November. Image Credit: Jeff Schmaltz at NASA GSFC. Caption by Mike Carlowicz. #fall #autumn #leaves #fallleaves #autumnleaves #seasons #seasonalchange #greatlakes #nasa #earth #earthpics #modis; -
Astronaut Reid Wiseman aboard the International Space Station posted this image and wrote, "The #MilkyWay steals the show from #Sahara sands that make the #Earth glow orange." The Expedition 41 crew, which doubled the number of humans in space when three new crew members arrived last week, began its first full workweek as a six-person crew Monday with biological research and preparations for a pair of U.S. spacewalks. Image Credit: NASA #nasa #space #spacestation #iss #galaxy #science #exp41 334FFB64-23D4-4F60-8226-8DD2CE94C8E4; -
Ocean Data Shows 'Climate Dance' of Plankton: The greens and blues of the ocean color provide new insights into how climate and ecosystem processes affect the growth cycles of phytoplankton-microscopic aquatic plants important for fish populations and Earth's carbon cycle. Image: near the Pribilof Islands off the coast of Alaska, in the Bering Sea. The turquoise waters are likely colored by a type of phytoplankton called coccolithophores. This Sept. 22, 2014, image was created with Landsat 8 data. Credit: NASA's Goddard Space Flight Center, Norman Kuring; USGS #nasa #climate #earth #earthrightnow #ocean #alaska #beringsea #landsat #science C5B3873E-412F-49C0-AA5B-431F22CA55C7; -
Mid-level Solar Flare Captured: A mid-level solar flare, M5.1 class, erupts from the sun, peaking at 10:58 p.m. EDT on Sept. 27, 2014, in this image from our Solar Dynamics Observatory. The bright flash of light shows material at some 18 million F. SDO captures such temperatures by focusing on light with a wavelength of 131 Angstroms, which is typically colorized in teal. Image Credit: NASA/SDO #nasa #sun #flare #solarflare #sdo #science;
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Hubble Finds Jets and Explosions Spiral Galaxy: This new image from the Hubble Space Telescope shows a spiral galaxy in the constellation of Sculptor some 13 million light-years away from Earth. It is one of the brightest galaxies in the Sculptor Group, one of the closest groups of galaxies to the Local Group — the group of galaxies containing our galaxy, the Milky Way and the Magellanic Clouds. The image shows its spiral arms and small central bulge. Unlike some other spirals, this one doesn’t have a very pronounced spiral structure, and its shape is further muddled by the mottled pattern of dark dust that stretches across the frame. The occasional burst of bright pink can be seen in the galaxy, highlighting stellar nurseries containing newly-forming baby stars. Image credit: ESA/Hubble & NASA, Acknowledgement: D. Calzetti (University of Massachusetts) and the LEGUS Team #nasa #galaxy #astronomy #hubble #hst #milkyway #science; -
A twisted blob of solar material – a hot, charged gas called plasma – can be seen erupting off the side of the sun on Sept. 26, 2014. The image is from NASA's Solar Dynamics Observatory, focusing in on ionized Helium at 60,000 degrees C. Image Credit: NASA/SDO; -
Our Rover Drill Pulls First Taste From Mars Mountain: This image from the Mars Hand Lens Imager (MAHLI) camera on NASA's Curiosity Mars rover shows the first sample-collection hole drilled in Mount Sharp, the layered mountain that is the science destination of the rover's extended mission. The hole is 0.63 inch (1.6 centimeters) in diameter and about 2.6 inches (6.7 centimeters) deep, at a target called "Confidence Hills" on the "Pahrump Hills" outcrop at the base of the mountain. This is a merged-focus image product combining information from multiple images that MAHLI took from a position 2 inches (5 centimeters) away from the target. The images were taken on Sept. 24, 2014, during the 759th Martian day, or sol, of Curiosity's work on Mars. Credit: NASA/JPL-Caltech/MSSS #nasa #mars #journeytomars #space #planets #msl #curiosity #science; -
And liftoff! The Soyuz TMA-14M launched from the Baikonur Cosmodrome in Kazakhstan to the International Space Station at 4:25 p.m. EDT. NASA astronaut Butch Wilmore and Russian cosmonauts Alexander Samokutyaev and Elena Serova now are safely in orbit. Wilmore, Samokutyaev and Serova will dock with the station's Poisk module at 10:15 p.m. later today. Photo Credit: (NASA/Joel Kowsky) #nasa #isscrew #iss #spacestation #soyuz #space #astronauts #launch #exp41; -
Boarding for Launch: Expedition 41 Soyuz Commander Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos), bottom, Flight Engineer Barry Wilmore of NASA, middle, and Flight Engineer Elena Serova of Roscosmos, top, wave farewell prior to boarding the Soyuz TMA-14M rocket for launch, Thursday, Sept. 25, 2014, at the Baikonur Cosmodrome in Kazakhstan. Samokutyaev, Serova, and Wilmore will spend the next five and a half months aboard the International Space Station. Serova will become the fourth Russian woman to fly in space and the first Russian woman to live and work on the station. Photo Credit: (NASA/Joel Kowsky) #nasa #isscrew #iss #spacestation #soyuz #space #astronauts #launch #exp41;
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