โพสต์เมื่อ 1 ม.ค. 2557 | 02:21 น.
นาซา
Explore the universe and discover our home planet with the official NASA Instagram account
ของ NASA
มี 0 คนชอบรูปนี้
-
New York City at Night! An astronaut aboard the International Space Station exposed this 400 millimeter night image of the greater New York City metropolitan area on March 23, 2013. For orientation purposes, note that Manhattan runs horizontal through the frame from left to the midpoint. Central Park is just a little to the left of frame center. NASA astronauts will help ring in 2014 by sending greetings from space and from Earth to the crowd gathered in New York's Times Square on New Year’s Eve. Astronaut Mike Massimino will participate in the New Year’s Eve Countdown event on Tuesday evening, Dec. 31. He also will introduce a video greeting from Expedition 36 flight engineer Karen Nyberg, who returned from the International Space Station in November, and from three of the astronauts currently on board the space station: NASA's Rick Mastracchio and Mike Hopkins, and Koichi Wakata of the Japan Aerospace Exploration Agency. The New Year’s countdown will be shown from 6 p.m. to 12:15 a.m. EST on the Toshiba Vision screen atop One Times Square, right below the New Year countdown ball. Prominently positioned below the world-famous Times Square New Year's Eve Ball, the dual LED screens will allow revelers in Times Square to see this special greeting from space. Image Credit: NASA #nasa #space #spacestation #iss #newyear #timessquare #newyork #nycity #astronauts #earth #toshiba #newyearseve #party #celebrate #jaxa #nye; -
The vortex at Saturn's north pole -- seen here in the infrared -- takes on the menacing look of something from the imagination of Edgar Allen Poe. But really, of course, it's just another example of the amazing, mesmerizing meteorology on Saturn. The eye of the immense cyclone is about 2,000 kilometers (1,250 miles) wide, 20 times larger than most on Earth. For another view of the vortex, see Vortex in Psychedelic Color. This view is centered on clouds at 89 degrees north latitude, 109 degrees west longitude. North is up and rotated 33 degrees to the left. The image was taken with the Cassini spacecraft narrow-angle camera on June 14, 2013 using a spectral filter sensitive to wavelengths of near-infrared light centered at 750 nanometers. The view was acquired at a distance of approximately 476,000 miles (766,000 kilometers) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 45 degrees. Image scale is 3 miles (5 kilometers) per pixel. Credit: NASA/JPL-Caltech/Space Science Institute #saturn #cassini #space #nasa #solarsystem #planets #planet #nofilter; -
Flat as a Pancake -Located some 25 million light-years away, this new Hubble image shows spiral galaxy ESO 373-8. Together with at least seven of its galactic neighbors, this galaxy is a member of the NGC 2997 group. We see it side-on as a thin, glittering streak across the sky, with all its contents neatly aligned in the same plane. We see so many galaxies like this — flat, stretched-out pancakes — that our brains barely process their shape. But let us stop and ask: Why are galaxies stretched out and aligned like this? Try spinning around in your chair with your legs and arms out. Slowly pull your legs and arms inwards, and tuck them in against your body. Notice anything? You should have started spinning faster. This effect is due to conservation of angular momentum, and it’s true for galaxies, too. This galaxy began life as a humongous ball of slowly rotating gas. Collapsing in upon itself, it spun faster and faster until, like pizza dough spinning and stretching in the air, a disc started to form. Anything that bobbed up and down through this disk was pulled back in line with this motion, creating a streamlined shape. CREDIT: NASA #nasa #space #hubble #galaxy #hst #universe #esa #nebula #earth #light #science #astronomy; -
What is the coldest place in the world? It is a high ridge in Antarctica on the East Antarctic Plateau where temperatures in several hollows can dip below minus 133.6° Fahrenheit (minus 92° Celsius) on a clear winter night - colder than the previous recorded low temperature. Scientists at the National Snow and Ice Data Center made the discovery while analyzing the most detailed global surface temperature maps to date, developed with data from remote sensing satellites including the MODIS sensor on NASA's Aqua satellite, and the TIRS sensor on Landsat 8, a joint project of NASA and the U.S. Geological Survey (USGS). The researchers analyzed 32 years of data from several satellite instruments that have mapped Antarctica's surface temperature. Near a high ridge that runs from Dome Arugs to Dome Fuji, the scientists found clusters of pockets that have plummeted to record low temperatures dozens of times. The lowest temperature the satellites detected - minus 136° F (minus 93.2° C), on Aug. 10, 2010. The new record is several degrees colder than the previous low of minus 128.6° F (minus 89.2° C), set in 1983 at the Russian Vostok Research Station in East Antarctica. The coldest permanently inhabited place on Earth is northeastern Siberia, where temperatures dropped to a bone-chilling 90 degrees below zero F (minus 67.8° C) in the towns of Verkhoyansk (in 1892) and Oimekon (in 1933). Image Credit: Ted Scambos, National Snow and Ice Data Center #landsat #cold #winter #earthscience #earth #nasa #earthobservations #earthobs #landsat8 #nsidc #antarctica; -
Winter is approaching in the southern hemisphere of Saturn and with this cold season has come the familiar blue hue that was present in the northern winter hemisphere at the start of NASA's Cassini mission. The changing blue hue that we have learned marks winter at Saturn is likely due to reduction of ultraviolet sunlight and the haze it produces, making the atmosphere clearer and increasing the opportunity for Rayleigh scattering (scattering by molecules and smaller particles) and methane absorption: both processes make the atmosphere blue. The small black dot seen to the right and up from image center, within the ring shadows of the A and F rings, is the shadow of the moon, Prometheus. This view looks toward the unilluminated side of the rings from about 44 degrees below the ring plane. Images taken using red, green and blue spectral filters were combined to create this natural color view. The images were taken with the Cassini spacecraft wide-angle camera on July 29, 2013. This view was acquired at a distance of approximately 1.003 million miles (1.615 million kilometers) from Saturn. Image scale is 58 miles (93 kilometers) per pixel. Image Credit: NASA/JPL-Caltech/Space Science Institute #saturn #cassini #space #nasa #solarsystem #planets #winter #planet #nofilter;
-
On Dec. 24, 2013, NASA astronaut Mike Hopkins, Expedition 38 Flight Engineer, participates in the second of two U.S. spacewalks, spread over a four-day period, which were designed to allow the crew to change out a faulty water pump on the exterior of the Earth-orbiting International Space Station. He was joined on both spacewalks by NASA astronaut Rick Mastracchio, whose image shows up in Hopkins' helmet visor. Today, Dec. 27, 2013, Expedition 38 Commander Oleg Kotov and Flight Engineer Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos) have ventured outside the orbiting outpost to install a pair of high fidelity cameras on a platform attached to the Zvezda Service Module as part of a commercial arrangement between Roscosmos and a Canadian company to downlink Earth observation imagery. This is the last of six Russian spacewalks planned for this year. Image Credit: NASA #spacewalk #astronauts #astropix #earth #nasa #iss #spacestation #exp38 #nofilter; -
OCO-2 Observatory Conducts Environmental Tests NASA's Orbiting Carbon Observatory (OCO)-2 spacecraft is moved into a thermal vacuum chamber at Orbital Sciences Corporation's Satellite Manufacturing Facility in Gilbert, Ariz., for a series of environmental tests. The tests confirmed the integrity of the observatory's electrical connections and subjected the OCO-2 instrument and spacecraft to the extreme hot, cold and airless environment they will encounter once in orbit. The observatory's solar array panels were removed prior to the test. OCO-2 is NASA's first mission dedicated to studying atmospheric carbon dioxide and is the latest mission in NASA's study of the global carbon cycle. Carbon dioxide is the most significant human-produced greenhouse gas and the principal human-produced driver of climate change. The mission will uniformly sample the atmosphere above Earth's land and ocean, collecting between 100,000 and 200,000 measurements of carbon dioxide concentration over Earth's sunlit hemisphere every day for at least two years. It will do so with the accuracy, resolution and coverage needed to provide the first complete picture of the regional-scale geographic distribution and seasonal variations of both human and natural sources of carbon dioxide emissions as well as the places where carbon dioxide is removed from the atmosphere and stored. Image Credit: Orbital Sciences Corporation/NASA/JPL-Caltech #oco2 #carbon #satellite #testing #nasa #space #earthscience #spacecraft; -
NASA's Wide-field Infrared Survey Explorer (WISE) mission presents the "Wreath nebula." Though this isn't the nebula's official name (it's actually called Barnard 3, or IRAS Ring G159.6-18.5), one might picture a wreath in these bright green and red dust clouds -- a ring of evergreens donned with a festive red bow, a jaunty sprig of holly, and silver bells throughout. Interstellar clouds like these are stellar nurseries, places where baby stars are being born. The green ring (evergreen) is made of tiny particles of warm dust whose composition is very similar to smog found here on Earth. The red cloud (bow) in the middle is probably made of dust that is more metallic and cooler than the surrounding regions. The bright star in the middle of the red cloud, called HD 278942, is so luminous that it is likely what is causing most of the surrounding ring to glow. In fact its powerful stellar winds are what cleared out the surrounding warm dust and created the ring-shaped feature in the first place. The bright greenish-yellow region left of center (holly) is similar to the ring, though more dense. The bluish-white stars (silver bells) scattered throughout are stars located both in front of, and behind, the nebula. Regions similar to this nebula are found near the band of the Milky Way galaxy in the night sky. The "wreath" is slightly off this band, near the boundary between the constellations of Perseus and Taurus, but at a relatively close distance of only about 1,000 light-years, the cloud is a still part of our Milky Way. The colors used in this image represent specific wavelengths of infrared light. Blue and cyan (blue-green) represent light emitted at wavelengths of 3.4 and 4.6 microns, which is predominantly from stars. Green and red represent light from 12 and 22 microns, respectively, which is mostly emitted by dust. Image Credit: NASA/JPL-Caltech/UCLA #christmas #nasa #space #wise #wreath #red #green #holiday #nebula #universe; -
Listening to Space: For 50 years, NASA's Deep Space Network has served as the lifeline to explorers of deep space and the pipeline for all of the stunning images and data those spacecraft send back to us. A network of dishes, like this one at the complex in Goldstone, Calif., send signals or listen to signals 24 hours a day, seven days a week, 365 days a year. The network provides radio communications for all of NASA's interplanetary spacecraft and is also utilized for radio astronomy and radar observations of the solar system and the universe. Image credit: NASA/JPL-Caltech #DSN50 #deepspace #universe #nasa #goldstone #radiodish #50thanniversary #space #wifi #internet #communications #satellitedish; -
45th Anniversary of 'Earthrise' Image: Forty-five years ago, in December of 1968, the Apollo 8 crew flew from the Earth to the Moon and back again. Frank Borman, James Lovell, and William Anders were launched atop a Saturn V rocket on Dec. 21, circled the Moon ten times in their command module, and returned to Earth on Dec. 27. The Apollo 8 mission's impressive list of firsts includes: the first humans to journey to the Earth's Moon, the first to fly using the Saturn V rocket, and the first to photograph the Earth from deep space. As the Apollo 8 command module rounded the far side of the Moon on Dec. 24, the crew could look toward the lunar horizon and see the Earth appear to rise, due to their spacecraft's orbital motion. Their famous picture of a distant blue Earth above the Moon's limb was a marvelous gift to the world. Image Credit: NASA #nasa #space #apollo #apollo8 #earthrise #earthpic #earth #moon;
-
Astronauts Complete First in Series of Spacewalks: On Sunday, Dec. 22, NASA astronaut Mike Hopkins tweeted this photo of Saturday's spacewalk, saying, "Wow... can't believe that is me yesterday. Wish I could find the words to describe the experience, truly amazing." Expedition 38 Flight Engineers Rick Mastracchio and Mike Hopkins wrapped up a 5-hour, 28-minute spacewalk outside the International Space Station at 12:29 p.m. EST Saturday, completing the first in a series of excursions aimed at replacing a degraded ammonia pump module associated with one of the station's two external cooling loops that keeps both internal and external equipment cool. A second spacewalk to install a replacement pump module is scheduled for Tuesday, Dec. 24 at 7:10 a.m. EST, with NASA TV coverage beginning at 6:15 a.m. EST. Image credit: NASA; -
Boom! Supernova remnants such as the Jellyfish Nebula can boost particles to enormous energies. Congratulations to NASA’s Fermi team! Their science findings on Cosmic Particle Accelerators earlier this year made runner up in Science Magazine’s Breakthrough of the Year! To reach the article, visit: http://go.nasa.gov/1drB4q0 CREDIT: NASA/DOE/FERMI LAT COLLABORATION, TOM BASH AND JOHN FOX/ADAM BLOCK/NOAO/AURA/NSF, JPL-CALTECH/UCLA #nasa #space #fermi #nebula #discovery #2013 #cosmix #science #astrophysics; -
Hubble Sees a Stellar "Sneezing Fit" - Look at the bright star in the middle of this image. It appears as if it just sneezed. This sight will only last for a few thousand years — a blink of an eye in the young star's life. If you could carry on watching for a few years you would realize it's not just one sneeze, but a sneezing fit. This young star is firing off rapid releases of super-hot, super-fast gas, like multiple sneezes, before it finally exhausts itself. These bursts of gas have shaped the turbulent surroundings, creating structures known as Herbig-Haro objects. These objects are formed from the star's energetic "sneezes." Launched due to magnetic fields around the forming star, these energetic releases can contain as much mass as our home planet, and cannon into nearby clouds of gas at hundreds of kilometers/miles per second. Shock waves form, such as the U-shape below this star. Unlike most other astronomical phenomena, as the waves crash outwards, they can be seen moving across human timescales of years. Soon, this star will stop sneezing, and mature to become a star like our sun. Credit: ESA/Hubble & NASA, Acknowledgement: Gilles Chapdelaine #nasa #space #science #hubble #hst #astronomy #gas #star #physics; -
Spacewalkers Remove Degraded Ammonia Pump - Expedition 38 Flight Engineers Rick Mastracchio and Mike Hopkins wrapped up a 5-hour, 28 minute spacewalk outside the International Space Station at 12:29 p.m. EST today, completing the first in a series of excursions aimed at replacing a degraded ammonia pump module associated with one of the station's two external cooling loops that keeps both internal and external equipment cool. The two astronauts focused on removing a degraded pump module from Loop A of the station’s external Active Thermal Control System. That pump module encountered a problem Dec. 11 when an internal valve stuck in an incorrect position, causing temperatures in the station’s cooling lines to drop. On Monday, Mastracchio and Hopkins will venture outside the station again to begin the installation of a replacement pump module. If necessary a third spacewalk would occur on Christmas day to finalize the installation. In this image, Mastracchio holds the degraded pump module while the space station's robotic arm guides the module to a grapple fixture. Image Credit: NASA TV #nasa #space #iss #spacewalk #exp38 #eva #astronauts; -
Astronauts Prepare for Spacewalks - Expedition 38 crew member Mike Hopkins checks out the spacesuit he will wear outside the International Space Station on Saturday, Dec. 21, 2013. He and fellow astronaut Rick Mastracchio will conduct a series of spacewalks to replace an ammonia pump that is part of the station's coolant system. This will be Hopkins' first spacewalk, while Mastracchio has had six previous ones on STS-118 and STS-131. CREDIT: NASA #nasa #space #iss #astronauts #spacestation #exploration #station #eva #spacewalk;
Instagram is a registered trademark of Instagram, inc.
