โพสต์เมื่อ 10 ต.ค. 2557 | 03:20 น.
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Astronomers have found a pulsating, dead star beaming with the energy of about 10 million suns. This is the brightest pulsar – a dense stellar remnant left over from a supernova explosion – ever recorded. The discovery was made with NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR. Seen here is a rare and mighty pulsar (pink) can be seen at the center of the galaxy Messier 82 in this new multi-wavelength portrait. NASA's NuSTAR mission discovered the "pulse" of the pulsar — a type of dead star — using is high-energy X-ray vision. Image credit: NASA/JPL-Caltech; -
Blood Moon! On Wednesday morning, Oct. 8th, not long before sunrise, the bright full moon over North America turned a lovely shade of celestial red. The lunar eclipse was visible from all parts of the USA. A lunar eclipse happens when the Earth casts a shadow that blocks sunlight that normally reflects off of the moon. A total lunar eclipse can only happen when the sun, Earth and moon are perfectly aligned. During the time of total eclipse, the moon will often look reddish due to red and orange light being scattered by the atmosphere. This eerie, harmless effect has earned the tongue-in-cheek nickname "blood moon." Image Credit: NASA #nasa #space #eclipse #lunareclipse #redmoon #bloodmoon #moon #earth #totallunareclipse; -
Astronaut Reid Wiseman shared this image from today's spacewalk tweeting "what an experience." His fellow spacewalker, ESA astronaut Alexander Gerst also tweeted "I do not have words to describe what we did today." The duo worked outside for six hours, thirteen minutes. They installed a degraded pump module on an external stowage platform and an electrical relay system that will provide backup power to the Mobile Transporter, which can move supplies on rails along the station's backbone, and the space station's robotic arm, Canadarm2. Image credit: NASA #spacewalk #iss #exp41 @iss #nasa #spacestation; -
A Spacewalker's View: Astronaut Reid Wiseman of NASA and Alexander Gerst of ESA ended today's spacewalk at 2:43 p.m. EDT. They installed a degraded pump module on an external stowage platform and an electrical relay system that will provide backup power to the Mobile Transporter, which can move supplies on rails along the station's backbone, and the space station's robotic arm, Canadarm2. Wiseman and Gerst now have spent 6 hours and 13 minutes in space. Wiseman and NASA's Barry "Butch" Wilmore are scheduled to conduct another spacewalk on Oct. 15. Wiseman posted this image to Twitter and wrote, "The view was reasonably INSANE during the #spacewalk." Image Credit: NASA #nasa #iss #spacestation #exp41 #eva #earth #esa #space; -
Study Finds Earth’s Ocean Abyss Has Not Warmed: The cold waters of Earth’s deep ocean have not warmed measurably since 2005, according to a new NASA study, leaving unsolved the mystery of why global warming appears to have slowed in recent years. Scientists at our Jet Propulsion Laboratory (JPL) analyzed satellite and direct ocean temperature data from 2005 to 2013 and found the ocean abyss below 1.24 miles (1,995 meters) has not warmed measurably. Study coauthor Josh Willis of JPL said these findings do not throw suspicion on climate change itself. This image shows heat radiating from the Pacific Ocean as imaged by our Clouds and the Earth's Radiant Energy System instrument on the Terra satellite. (Blue regions indicate thick cloud cover.) Image Credit: NASA #nasa #earth #earthrightnow #climate #satellites #terra #oceans #science;
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Our satellites stare at Typhoon #Phanfone's large eye: We captured data on Typhoon Phanfone as it continues to strengthen as it moves through the Northwestern Pacific Ocean. The Tropical Rainfall Measuring Mission or TRMM satellite flew over Typhoon Phanfone on Oct. 2, 2014 at 5:39 a.m. EDT. The rainfall pattern observed using TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) data showed that Phanfone was much better organized than a day earlier. Image Credit: NASA Goddard MODIS Rapid Response Team #nasa #storm #weather #earth #earthrightnow #phanfone #trmm # aqua #satellite #modis #science; -
Italy from Space: Astronaut Reid Wiseman aboard the International Space Station posted this image and wrote, "#Italy, lone #lightning strike, moonlight on the Med. #Perfection." The six-person space station Expedition 41 crew conducted scientific experiments Friday, closing out a busy week focused on gearing up for two spacewalks. During the first spacewalk beginning around 8:10 a.m. EDT Tuesday, Wiseman and Alexander Gerst will exit out the Quest airlock for a six-and-a-half hour excursion. Flight Engineer Barry Wilmore, who will be inside the cupola to provide robotic support, will join Wiseman on Oct. 15 for another excursion outside the station. Image Credit: NASA #nasa #exp41 #spacestation #space #europe #iss 8EB6C80B-452C-4367-BC62-9255657704AF; -
Saturn's many cloud patterns, swept along by high-speed winds, look as if they were painted on by some eager alien artist. With no real surface features to slow them down, wind speeds on Saturn can top 1,100 mph (1,800 kph), more than four times the top speeds on Earth. This view looks toward the sunlit side of the rings from about 29 degrees above the ringplane. The image was taken with the Cassini spacecraft wide-angle camera on April 4, 2014 using a spectral filter which preferentially admits wavelengths of near-infrared light centered at 752 nanometers. The view was obtained at a distance of approximately 1.1 million miles (1.8 million kilometers) from Saturn. Image scale is 68 miles (109 kilometers) per pixel. Credit: NASA/JPL-Caltech/Space Science Institute #cassini #saturn #solarsystem #planets #nasa #space #cassinisaturn; -
A dark snaking line in the upper right of this image on Sept. 30, 2014, show a filament of solar material hovering above the sun's surface. If straightened out, the filament would reach almost across the whole sun, about 1 million miles or 100 times the size of Earth. Solar Dynamics Observatory, or SDO, which watches the sun 24 hours a day, has observed this gigantic filament for several days as it rotated around with the sun. If straightened out, the filament would reach almost across the whole sun, about 1 million miles or 100 times the size of Earth. SDO captured the image in extreme UV light of 193 Angstrom and 335 Angstrom – different colors represent different wavelengths of light and different temperatures of solar material. Credit: NASA/SDO #nasa #space #sun #solar #sdo #uvlight #heliophysics #science; -
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;
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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; -
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.;
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