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The long, shallow grooves lining the surface of Phobos are likely early signs of the structural failure that will ultimately destroy this moon of Mars. Orbiting a mere 3,700 miles (6,000 kilometers) above the surface of Mars, Phobos is closer to its planet than any other moon in the solar system. Mars’ gravity is drawing in Phobos, the larger of its two moons, by about 6.6 feet (2 meters) every hundred years. Scientists expect the moon to be pulled apart in 30 to 50 million years. New modeling indicates that the grooves on Mars’ moon Phobos could be produced by tidal forces – the mutual gravitational pull of the planet and the moon. Initially, scientists had thought the grooves were created by the massive impact that made Stickney crater (lower right). Credits: NASA/JPL-Caltech/University of Arizona #nasa #space #phobos #mars #moon #solarsystem; -
Solar Outburst! This close-up video shows an active region near the right-hand edge of the sun's disk, which erupted with at least a dozen minor events over a 30-hour period from Nov. 3-5, 2015. As competing magnetic forces grappled with each other, tongues of solar material lashed out from the sun's surface and several small flares erupted --seen as white flashes in this extreme ultraviolet wavelength of 304 angstroms. Though the sun's extreme ultraviolet light is invisible to our eyes, the wavelength is colorized here in red. This video was captured by our Solar Dynamics Observatory. Credits: NASA/SDO #nasa #space #sdo #sun #solar #nasabeyond #science; -
Lenticular galaxies, like this one called Mrk 820, are in the transition zone between elliptical and spiral galaxies. A closer look at the appearance of Mrk 820 reveals hints of a spiral structure embedded in a circular halo of stars. Surrounding Mrk 820 in this image is a good sampling of other galaxy types, both elliptical and spiral. Most of the smears and specks are distant galaxies, but the prominent bright object at the bottom is a foreground star called TYC 4386-787-1. Image credit: ESA/Hubble & NASA and N. Grogin (STScI), Acknowledgement: Judy Schmidt #nasa #hubble #space #galaxy #galaxies #hst #nasahubble; -
Conducting a "cosmic archaeological dig" at the very heart of our Milky Way galaxy, astronomers uncovered the blueprints of our galaxy's early construction phase. Peering deep into the Milky Way's crowded central hub of stars, researchers using our Hubble Space Telescope have uncovered for the first time a population of ancient white dwarfs -- smoldering remnants of once-vibrant stars that inhabited the core. Finding these relics at last can yield clues to how our galaxy was built, long before Earth and our sun formed. This image is a small section of Hubble's view of the dense collection of stars crammed together in the galactic bulge. The region surveyed is located 26,000 light-years away. Credits: NASA/ESA/STScI/SWEEPS Science Team #nasa #space #galaxy #milklyway #hubble #hst #astronomy #nasabeyond #science; -
[Artist Concept] Speed of Solar Wind Stripping Martian Atmosphere: Our Mars Atmosphere and Volatile Evolution (MAVEN) mission has identified the process that appears to have played a key role in the transition of the Martian climate from an early, warm and wet environment that might have supported surface life to the cold, arid planet Mars is today. MAVEN data have enabled researchers to determine the rate at which the Martian atmosphere currently is losing gas to space via stripping by the solar wind. The findings reveal that the erosion of Mars' atmosphere increases significantly during solar storms. This image is an artist's rendering of a solar storm hitting Mars and stripping ions from the planet's upper atmosphere. Credits: NASA/GSFC #nasa #maven #mars #journeytomars #space #nasabeyond #atmosphere #planets #science;
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Want to #BeAnAstronaut? In anticipation of returning human spaceflight launches to American soil, and in preparation for our journey to Mars, we will soon begin accepting applications for the next class of astronaut candidates. With more human spacecraft in development in the United States today than at any other time in history, future astronauts will launch once again from the Space Coast of Florida on American-made commercial spacecraft, and carry out deep-space exploration missions that will advance a future human mission to Mars. The next class of astronauts may fly on any of four different U.S. vessels during their careers: the International Space Station, two commercial crew spacecraft currently in development by U.S. companies, and our Orion deep-space exploration vehicle. From pilots and engineers, to scientists and medical doctors, we select qualified astronaut candidates from a diverse pool of U.S. citizens with a wide variety of backgrounds. We will accept applications from Dec. 14 through mid-February and expect to announce candidates selected in mid-2017. Stay tuned! Video credit: NASA @iss #nasa #astronaut #astronauts #space #jobs #jobopening; -
Whopping Galaxy Cluster Spotted: Astronomers have discovered a giant gathering of galaxies in a very remote part of the universe, thanks to our Spitzer Space Telescope and Wide-field Infrared Survey Explorer (WISE). This galaxy cluster, located 8.5 billion light-years away, is the most massive structure yet found at such great distances. Galaxy clusters are gravitationally bound groups of thousands of galaxies, which themselves each contain hundreds of billions of stars. The clusters grow bigger and bigger over time as they acquire new members. The red galaxies at the center of the image make up the heart of the galaxy cluster. This color image is constructed from multi-wavelength observations: Infrared observations from NASA's Spitzer Space Telescope are shown in red; near-infrared and visible light is green and blue; and radio light is purple. In addition to galaxies, clusters also contain a reservoir of hot gas with temperatures in the tens of millions of degrees Celsius/Kelvin. Image credit: NASA/JPL-Caltech/Gemini/CARMA #nasa #galaxy #space #spitzer #nasabeyond #galaxycluster @nasawise #science; -
A milestone of human achievement, people have lived off the planet continuously for 15 years aboard the International Space Station (@ISS). Think about it, a teenager doesn't know a world where humans haven't lived and worked in space. Since Nov. 2, 2000, NASA astronauts and our international partners work off the Earth, for the Earth. From 1998 to 2011, five different space agencies representing 15 countries assembled the station, the largest structure ever built in space. Since being occupied in 2000, we've conducted more than 1,760 research investigations on the orbiting laboratory and more than 220 people from 17 countries have visited. Image credit: NASA #space #spacestation #anniversary#milestone #OffTheEarthForTheEarth #nasa #15YearsOnStation #iss; -
For 15 years, since Nov. 2, 2000, there has been a continuous human presence on the International Space Station (@ISS) orbiting Earth in space, as NASA astronauts and their international partners work off the Earth, for the Earth. From 1998 to 2011, five different space agencies representing 15 countries assembled the station, the largest structure ever built in space. Since being occupied in 2000, we've conducted more than 1,760 research investigations on the orbiting laboratory and more than 220 people from 17 countries have visited. In this image is NASA astronaut Tracy Caldwell Dyson taking a moment during her space station mission in 2010 to enjoy an unmatched view of home through a window in the Cupola of the International Space Station, the brilliant blue and white part of Earth glowing against the blackness of space. Image credit: NASA #space #spacestation #anniversary #milestone #OffTheEarthForTheEarth #nasa #15YearsOnStation; -
Smoke Ring for a Halo Two stars shine through the center of a ring of cascading dust in this image taken by the Hubble Space Telescope. The star system is named DI Cha, and while only two stars are apparent, it is actually a quadruple system containing two sets of binary stars. As this is a relatively young star system it is surrounded by dust. The young stars are molding the dust into a wispy wrap. Image credit: ESA/Hubble & NASA, Acknowledgement: Judy Schmidt #nasa #space #hubble #hst #star #stars #starsystem;
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Happy Halloween! We present a solar 'pumpkin!' Active regions on the sun combined to look something like a jack-o-lantern’s face on October 2014. The image was captured by NASA's Solar Dynamics Observatory, or SDO, which watches the sun at all times from its orbit in space. The active regions in this image appear brighter because those are areas that emit more light and energy. Credit: NASA/SDO #nasa #sun #sdo #halloween #happyhalloween #space #naaabeyond #science #pumpkin #jackolantern; -
Halloween Skies to Include Dead Comet Flyby: The large space rock that will safely zip past Earth this Halloween is most likely a dead comet that, fittingly, bears an eerie resemblance to a skull. This image of asteroid 2015 TB145 was generated using radar data collected by the National Science Foundation's 1,000-foot (305-meter) Arecibo Observatory in Puerto Rico. The radar image was taken on Oct. 30, 2015, and the image resolution is 25 feet (7.5 meters) per pixel. Credits: NAIC-Arecibo/NSF #nasa #happyhalloween #space #comet #asteroid #asteroid2015 #nasabeyond #astronomy #halloween #science; -
A Full View of Pluto's Stunning Crescent: In September, the New Horizons team released a stunning but incomplete image of Pluto's crescent. Thanks to new processing work by the science team, New Horizons is releasing the entire, breathtaking image of Pluto. This image was made just 15 minutes after New Horizons' closest approach to Pluto on July 14, 2015, as the spacecraft looked back at Pluto toward the sun. The backlighting highlights more than a dozen high-altitude layers of haze in Pluto's tenuous atmosphere. The horizontal streaks in the sky beyond Pluto are stars, smeared out by the motion of the camera as it tracked Pluto. Credit: NASA/JHUAPL/SwRI #nasa #pluto #plutoflyby #space #newhorizons #nasabeyond #science; -
Astronaut Selfie from Space! Scott Kelly took this photograph during a spacewalk outside the space station Wednesday. Sharing the image on social media, Kelly wrote, "#SpaceWalkSelfie Back on the grid! Great first spacewalk yesterday. Now on to the next one next week. #YearInSpace." This was the first spacewalk for both Kelly and astronaut Kjell Lindgren. Today, Oct. 29, Kelly becomes the U.S. astronaut who has lived in space the longest during a single U.S. spaceflight, and on Monday, Nov. 2, the crew celebrates the 15th year of a continuous human presence in space aboard the station. Image Credit: NASA #nasa #space #spacestation #spacewalk #eva #earth #iss; -
Deep Dive Through Enceladus Plume Complete (artist concept): Our Cassini spacecraft successfully completed its close flyby of Saturn's moon Enceladus today, passing 30 miles (49 kilometers) above the moon's south polar region at approximately 8:22 a.m. PDT (11:22 a.m. EDT). Mission controllers established two-way communication with the spacecraft this afternoon and expect it to begin transmitting data from the encounter this evening. Images are anticipated in the next 24 to 48 hours. Credits: NASA/JPL-Caltech (artist concept) #nasa #space #cassini #saturn #enceladus #nasabeyond #science;
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