Wednesday, November 16, 2011
Montage
This montage of New Horizons images shows Jupiter and its volcanic moon Io, and were taken during the spacecraft's Jupiter flyby in early 2007. The image of Jupiter is an infrared color composite taken by the spacecraft's near-infrared imaging spectrometer, the Linear Etalon Imaging Spectral Array. The infrared wavelengths used highlight variations in the altitude of the Jovian cloud tops, with blue denoting high-altitude clouds and hazes, and red indicating deeper clouds. The prominent bluish-white oval is the Great Red Spot. The observation was made at a solar phase angle of 75 degrees but has been projected onto a crescent to remove distortion caused by Jupiter's rotation during the scan. The image of Io is an approximately true-color composite taken by the panchromatic Long-Range Reconnaissance Imager with color information provided by the Multispectral Visible Imaging Camera. The image shows a major eruption in progress on Io's night side, at the northern volcano Tvashtar. Incandescent lava glows red beneath a volcanic plume, whose uppermost portions are illuminated by sunlight. The plume appears blue due to scattering of light by small particles within it.
Monday, November 14, 2011
NASA and Navy Veteran John Young
The Lunar Module (LM) "Orion" is on the left. The Lunar Roving Vehicle is parked beside the LM. The object behind Young in the shade of the LM is the Far Ultraviolet Camera/Spectrograph. Stone Mountain dominates the background in this lunar scene.
30 Doradus - The Growing Tarantula Within
Multimillion-degree gas detected in X-rays (blue) by the Chandra X-ray Observatory comes from shock fronts -- similar to sonic booms --formed by these stellar winds and by supernova explosions. This hot gas carves out gigantic bubbles in the surrounding cooler gas and dust shown here in infrared emission from the Spitzer Space Telescope (orange).
Image Credit: NASA
Saturday, November 12, 2011
Orion Drop Test 3
Engineers at NASA Langley conducted the third drop test of the Orion test article as part of Phase 1 water impact testing on Nov. 8. The capsule was hoisted about 20 feet above the ground with a pitch of 17 degrees. It reached a horizontal velocity of about 22 mph before splashing into the Hydro Impact Basin. Test conditions represented stable seas.
A crowd of more than 100, including NASA Center Directors, Orion Program Managers and engineers, NASA Langley employees, support contractors, NASA Tweetup participants and media watched.
NASA Ames Research Center News and Features Update
NASA, Science Technology Featured at Supercomputing Conference
NASA will highlight the vital role of supercomputing in the search for Earth-size planets, understanding the causes of space weather, relating air quality impacts to the changing weather and climate, improving aircraft performance, designing next-generation spacecraft, and much more at the 24th annual Supercomputing 2011 (SC11) conference.
Orion seen from the Rover
The Apollo 16 Lunar Module "Orion" is photographed from a distance by astronaut Charles M. Duke Jr., Lunar Module pilot, aboard the moving Lunar Roving Vehicle. Astronauts Duke and Commander John W. Young, were returning from the third Apollo 16 extravehicular activity. The RCA color television camera mounted on the LRV is in the foreground. A portion of the LRV's high-gain antenna is at top left.
Sunday, November 6, 2011
Mars' Newton Crater
This image, which combines orbital imagery with 3-D modeling, shows flows that appear in spring and summer on a slope inside Mars' Newton Crater. Sequences of observations recording the seasonal changes at this site and a few others with similar flows might be evidence of salty liquid water active on Mars today. Evidence for that possible interpretation is presented in a report by McEwen et al. in the Aug. 5, 2011, edition of Science.
This image has been reprojected to show a view of a slope as it would be seen from a helicopter inside the crater, with a synthetic Mars-like sky. The source observation was made May 30, 2011, by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. Color has been enhanced. The season was summer at the location, 41.6 degrees south latitude, 202.3 degrees east longitude.
The flow features are narrow (one-half to five yards or meters wide), relatively dark markings on steep (25 to 40 degree) slopes at several southern hemisphere locations. Repeat imaging by HiRISE shows the features appear and incrementally grow during warm seasons and fade in cold seasons.
Monday, September 12, 2011
New Supernova Remnant Lights Up
Using the Hubble Space Telescope, astronomers are witnessing the unprecedented transition of a supernova to a supernova remnant, where light from an exploding star in a neighboring galaxy, the Large Magellanic Cloud, reached Earth in February 1987. Named Supernova 1987A, it was the closest supernova explosion witnessed in almost 400 years. The supernova's close proximity to Earth allows astronomers to study it in detail as it evolves. Now, the supernova debris, which has faded over the years, is brightening. This means that a different power source has begun to light the debris. The debris of SN 1987A is beginning to impact the surrounding ring, creating powerful shock waves that generate X-rays observed with NASA's Chandra X-ray Observatory. Those X-rays are illuminating the supernova debris and shock heating is making it glow in visible light. Since its launch in 1990, the Hubble telescope has provided a continuous record of the changes in SN 1987A.
Image Credit: NASA, ESA, and P. Challis (Harvard-Smithsonian Center for Astrophysics)
Friday, September 9, 2011
The Viking 2 lander settled down at Utopia Planitia on Sept. 3, 1976, while the Viking 1 Lander touched down on the western slope of Chryse Planitia (the Plains of Gold) on July 20, 1976.
Besides taking photographs and collecting other science data on the Red Planet's surface, the two landers conducted three biology experiments designed to look for possible signs of life. These experiments discovered unexpected and enigmatic chemical activity in the Martian soil, but provided no clear evidence for the presence of living microorganisms in soil near the landing sites. According to scientists, Mars is self-sterilizing. They believe the combination of solar ultraviolet radiation that saturates the surface, the extreme dryness of the soil and the oxidizing nature of the soil chemistry prevent the formation of living organisms in the Martian soil.
Although the Viking mission was planned to continue for 90 days after landing, each orbiter and lander operated far beyond its design lifetime. Viking Orbiter 1 functioned until July 25, 1978, while Viking Orbiter 2 continued for four years and 1,489 orbits of Mars, concluding its mission Aug. 7, 1980. Because of the variations in available sunlight, both landers were powered by radioisotope thermoelectric generators -- devices that create electricity from heat given off by the natural decay of plutonium. That power source allowed long-term science investigations that otherwise would not have been possible. The last data from Viking Lander 2 arrived at Earth on April 11, 1980. Viking Lander 1 made its final transmission to Earth Nov. 11, 1982.
Image Credit: NASA/JPL-Caltech/University of Arizona
Tropical Storm Maria (Atlantic Ocean)
Tropical Storm Maria appears smaller than Lee, Katia and Nate on today's GOES-13 visible satellite image
Tropical Storm Nate (Gulf of Mexico)
Nate appears as a small rounded area of clouds on today's GOES-13 satellite image.
Thursday, September 8, 2011
NASA Spacecraft Observes New Characteristics Of Solar Flares
NASA's Solar Dynamics Observatory, or SDO, has provided scientists new information about solar flares indicating an increase in strength and longevity that is more than previously thought.
Wednesday, September 7, 2011
The Moon's North Pole
The Earth's moon has been an endless source of fascination for humanity for thousands of years. When at last Apollo 11 landed on the moon's surface in 1969, the crew found a desolate, lifeless orb, but one which still fascinates scientist and non-scientist alike. This image of the moon's north polar region was taken by the Lunar Reconnaissance Orbiter Camera, or LROC. One of the primary scientific objectives of LROC is to identify regions of permanent shadow and near-permanent illumination. Since the start of the mission, LROC has acquired thousands of Wide Angle Camera images approaching the north pole. From these images, scientists produced this mosaic, which is composed of 983 images taken over a one month period during northern summer. This mosaic shows the pole when it is best illuminated, regions that are in shadow are candidates for permanent shadow. Image Credit: NASA/GSFC/Arizona State University










