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A New Gully Channel in Terra Sirenum, Mars! This pair of before (left) and after (right) images from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter documents the formation of a substantial new channel on a Martian slope between Nov. 5, 2010, and May 25, 2013. Gully or ravine landforms are commonly found in the mid-latitudes on Mars, particularly in the southern highlands. These features typically have an alcove at the upper end, feeding into a channel and an apron of debris that has been carried from above. Researchers using HiRISE have discovered many examples of gully activity likely driven by seasonal carbon-dioxide frost (dry ice). The changes visible by comparing the 2010 and 2013 observations at this site formed when material flowing down from the alcove broke out of an older route, eroded a new channel and formed a deposit on the apron. Although this pair of observations does not pin down the season of the event, locations HiRISE has imaged more often demonstrate that this sort of event generally occurs in winter, when liquid water is very unlikely. Despite their resemblance to water-formed ravines on Earth, carbon dioxide may play a key role in the formation of many Martian gullies. Image credit: NASA/JPL-Caltech/Univ. of Arizona #mars #hirise #mro #planets #gully #water #science; -
Jupiter's Great Red Spot! At about 89,000 miles in diameter, Jupiter could swallow 1,000 Earths. It is the largest planet in the solar system and perhaps the most majestic. Vibrant bands of clouds carried by winds that can exceed 400 mph continuously circle the planet's atmosphere. Such winds sustain spinning anticyclones like the Great Red Spot -- a raging storm three and a half times the size of Earth located in Jupiter’s southern hemisphere. In January and February 1979, NASA's Voyager 1 spacecraft zoomed toward Jupiter, capturing hundreds of images during its approach, including this close-up of swirling clouds around Jupiter's Great Red Spot. This image was assembled from three black and white negatives. The observations revealed many unique features of the planet that are still being explored to this day. Credit: NASA's Goddard Space Flight Center. #nasa #voyager #jupiter @planet @space @solarsystem #science #storm; -
The sun unleashed a M-9.3 flare, just short of an X class (the largest) from an active region right at the sun's edge (March 12-13, 2014). The bright flash is the tell-tale sign of a flare. The brightness of the flare causes very bright saturation and blooming above and below the flare region on the CCD detector and caused extended diffraction patterns to spread out across the SDO imager. Images were taken in extreme ultraviolet light, showing ionized iron at 10 million degrees. Credit: Solar Dynamics Observatory/NASA #nasa #sun #solar #flare #space #science; -
Scientists, using cameras aboard NASA's Lunar Reconnaissance Orbiter (LRO), have created the largest high resolution mosaic of our moon’s north polar region. The six-and-a-half feet (two-meters)-per-pixel images cover an area equal to more than one-quarter of the United States. The images making up the mosaic were taken by the two LRO Narrow Angle Cameras, which are part of the instrument suite known as the Lunar Reconnaissance Orbiter Camera (LROC). The cameras can record a tremendous dynamic range of lit and shadowed areas. Web viewers can zoom in and out, and pan around an area. Constructed from 10,581 pictures, the mosaic provides enough detail to see textures and subtle shading of the lunar terrain. Consistent lighting throughout the images makes it easy to compare different regions. Image Credit: NASA/GSFC/Arizona State University #moon #mosaic #nasa #space #lro #lunar #exploration #science; -
Saturn, which appears as only a thin, lit crescent, broken only by the shadows of its rings, poses gracefully for the Cassini spacecraft cameras. This view looks toward the unilluminated side of the rings from about 42 degrees below the ringplane. The image was taken with the Cassini spacecraft wide-angle camera on Sept. 20, 2013 using a spectral filter which only admits wavelengths of near-infrared light centered at 752 nanometers. The view was obtained at a distance of approximately 1.4 million miles (2.3 million kilometers) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 142 degrees. Image scale is 84.5 miles (136 kilometers) per pixel. Credit: NASA/JPL-Caltech/Space Science Institute #nasa #space #solarsystem #planets #saturn #cassini #nasacassini #planet;
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In celebration of the 24th anniversary of the launch of NASA's Hubble Space Telescope, astronomers have captured infrared-light images of a churning region of star birth 6,400 light-years away. The collection of images reveals a shadowy, dense knot of gas and dust sharply contrasted against a backdrop of brilliant glowing gas in the Monkey Head Nebula. The image demonstrates Hubble's powerful infrared vision and offers a tantalizing hint of what scientists can expect from the upcoming James Webb Space Telescope. Observations were taken in February, 2014. Massive newborn stars near the center of the nebula (and toward the right in this image) are blasting away at dust within the nebula. The ultraviolet light emitted by these bright stars helps shape the dust into giant pillars. This carving action occurs because the nebula is mostly composed of hydrogen gas, which becomes ionized by the ultraviolet radiation. As the dust particles are warmed by the ultraviolet light of the stars, they heat up and begin to glow at infrared wavelengths. Image Credit: NASA, ESA, Hubble Heritage Team (STScI/AURA) #nasa #space #universe #infrared #hubble #anniversary #telescope #stars #nebula; -
NASA’s Operation IceBridge images Earth's polar ice in unprecedented detail to better understand processes that connect the polar regions with the global climate system. IceBridge utilizes a highly specialized fleet of research aircraft and the most sophisticated suite of innovative science instruments ever assembled to characterize annual changes in thickness of sea ice, glaciers, and ice sheets. In addition, IceBridge collects critical data used to predict the response of earth’s polar ice to climate change and resulting sea-level rise. IceBridge also helps bridge the gap in polar observations between NASA's ICESat satellite missions. NASA's Operation IceBridge started the 2014 Arctic campaign with two surveys of sea ice north of Greenland. The two flights follow similar surveys flow in previous years and continue the mission's goals of collecting data on changing sea ice in the Arctic. Seen here is the moon over northeast Greenland while the Icebridge aircraft was descending into the survey area north of the Fram Strait. Credit: NASA/Michael Studinger #icebridge #nasa #ice #snow #greenland #earth #moon #operationicebridge #nasaice; -
A nearly full Rhea shines in the sunlight in this recent Cassini image. Rhea (949 miles, or 1,527 kilometers across) is Saturn's second largest moon. Lit terrain seen here is on the Saturn-facing hemisphere of Rhea. North on Rhea is up and rotated 43 degrees to the left. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 10, 2013. The view was obtained at a distance of approximately 990,000 miles (1.6 million kilometers) from Rhea. Image scale is 6 miles (9 kilometers) per pixel. Image Credit: NASA/JPL-Caltech/Space Science Institute #nasa #space #rhea #cassini #saturn #saturnmoon #solarsystem #nasacassini #planets #planet; -
As seen on the National Geographic Channel's Live from Space: Robonaut 2 -- made up of multiple component technologies and systems -- vision systems, image recognition systems, sensor integrations, tendon hands, control algorithms, and much more. #iss #livefromspace #spacestation #space #nasa #exploration; -
As seen on the National Geographic Channel's Live from Space: These SPHERES are actually used to test autonomous maneuvers on the International Space Station. #iss #livefromspace #spacestation #space #nasa #exploration;
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As seen on the National Geographic Channel's Live from Space: exercise in space! Train live an astronaut. Flight Engineer Karen Nyberg poses for a photo while exercising on the Cycle Ergometer with Vibration Isolation System in the Destiny laboratory of the International Space Station. Exercising and eating well keeps bones and muscles strong even in long term missions in microgravity. #iss #livefromspace #spacestation #space #nasa #exploration; -
We're following along with the National Geographic Channel's Live from Space broadcast. As seen on #LiveFromSpace, astronauts on the #ISS capture images of Earth's cities. St Louis at night. #iss #nasa #space #spacestation #exploration #stlouis #earth; -
We're following along with the National Geographic Channel's Live from Space broadcast. What does #Hawaii look like from the station? Here's a view not unlike that from #LiveFromSpace -- this one from 2010. #iss #nasa #space #spacestation #exploration; -
Happy Pi Day! Our Cassini spacecraft uses "pi transfer" to navigate path around Saturn. On Jan. 19, 2007, the Cassini spacecraft took this view of Saturn and its rings -- the visible documentation of a technique called a "pi transfer" completed with a Titan flyby. A pi transfer uses the gravity of Saturn's largest moon, Titan, to alter the orbit of the Cassini spacecraft so it can gain different perspectives on Saturn and achieve a wide variety of science objectives. During a pi transfer, Cassini flies by Titan at opposite sides of its orbit about Saturn (i.e., Titan's orbital position differs by pi radians between the two flybys) and uses Titan's gravity to change its orbital perspective on the ringed planet. Image Credit: NASA/JPL/Space Science Institute #piday #happypiday #nasa #cassini #space #astronomy #saturn #sun #pi #planets #titan #moon; -
An Interstellar Butterfly! The "butterfly effect" says the flap of a butterfly's wings may lead to a developing hurricane on the other side of the world. But what happens when a butterfly flaps its wings in the depths of space? This cosmic butterfly is a nebula known as AFGL 4104, or Roberts 22. Caused by a star that is nearing the end of its life and has shrugged off its outer layers, the nebula emerges as a cosmic chrysalis to produce this striking sight. Studies of the lobes of Roberts 22 have shown an amazingly complex structure, with countless intersecting loops and filaments. A butterfly's life span is counted in weeks; although on a much longer timescale, this stage of life for Roberts 22 is also transient. It is currently a pre-planetary nebula, a short-lived phase that begins once a dying star has pushed much of the material in its outer layers into space, and ends once this stellar remnant becomes hot enough to ionize the surrounding gas clouds and make them glow. About 400 years ago, the star at the center of Roberts 22 shed its outer shells, which raced outwards to form this butterfly. The central star will soon be hot enough to ionize the surrounding gas, and it will evolve into a fully-fledged planetary nebula. Credit: NASA, ESA #nasa #space #hst #hubble #astronomy #butterfly #science #nebula #stars;
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