Pulse of a dead star powers intense gamma rays 20 September 2014, 3:30 am While pulsars are often behind these gamma rays in our galaxy, other sources can be as well, including the outer shells of the supernova remnants, X-ray binary stars, and star-formation regions.
Mars spacecraft ready for September 21 orbit insertion 18 September 2014, 12:00 pm After insertion, MAVEN will begin its one-Earth-year primary mission to take measurements of the composition, structure, and escape of gases in Mars’ upper atmosphere and its interaction with the Sun and solar wind.
“Hot Jupiters” provoke their own host suns to wobble 16 September 2014, 3:30 am Although the planet’s mass is only one-thousandth of the mass of the Sun, the stars in these other solar systems are being affected by these planets and making the stars themselves act in a crazy way.
An anomaly in satellites' flybys confounds scientists 19 September 2014, 5:05 pm When space probes, such as Rosetta and Cassini, fly over certain planets and moons, in order to gain momentum and travel long distances, their speed changes slightly for an unknown reason. A researcher has now analyzed whether or not a hypothetical gravitomagnetic field could have an influence. However, other factors such as solar radiation, tides, or even relativistic effects or dark matter could be behind this mystery.
Latest measurements from the AMS experiment unveil new territories in the flux of cosmic rays 19 September 2014, 2:38 pm The Alpha Magnetic Spectrometer collaboration has just presented its latest results. These are based on the analysis of 41 billion particles detected with the space-based AMS detector aboard the International Space Station. The results provide new insights into the nature of the mysterious excess of positrons observed in the flux of cosmic rays.
Monster galaxies gain weight by eating smaller neighbors 19 September 2014, 2:38 pm Massive galaxies in the universe have stopped making their own stars and are instead snacking on nearby galaxies. Astronomers looked at more than 22,000 galaxies and found that while smaller galaxies are very efficient at creating stars from gas, the most massive galaxies are much less efficient at star formation, producing hardly any new stars themselves, and instead grow by 'eating' other galaxies.
NASA Ames to launch science experiments to space station on SpaceX rocket 18 September 2014, 6:28 pm NASA's Ames Research Center in Moffett Field, California, will launch four life science experiments to the International Space Station aboard NASA's next commercial cargo resupply flight of the SpaceX Dragon spacecraft. The research missions include a microbiology study of yeast, a fruit fly study designed and built by students, a plant biology investigation and the maiden voyage of NASA's new rodent research system.
Everything in moderation: Micro-8 to study regulating pathogens in space 18 September 2014, 6:26 pm Candida albicans, an opportunistic yeast pathogen and model organism for research, is common and usually doesn't damage our healthy personal ecosystem. However, when our immune system is stressed on Earth or in space, such as during long-duration space travel, C. albicans can grow out of control and potentially cause infections. Scientists want to address controlling these outbreaks with the next round of cellular growth experiments on the International Space Station -- Micro-8.
Dawn spacecraft operating normally after safe mode triggered 18 September 2014, 6:24 pm The Dawn spacecraft has resumed normal ion thrusting after the thrusting unexpectedly stopped and the spacecraft entered safe mode on September 11. That anomaly occurred shortly before a planned communication with NASA's Deep Space Network that morning. The spacecraft was not performing any special activities at the time.
NASA Mars spacecraft ready for Sept. 21 orbit insertion 18 September 2014, 6:22 pm NASA's Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft is nearing its scheduled Sept. 21 insertion into Martian orbit after completing a 10-month interplanetary journey of 442 million miles (711 million kilometers).
Pulse of a dead star powers intense gamma rays 18 September 2014, 6:08 pm NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, is helping to untangle the mystery of what powers high-energy gamma rays emanating from supernova. The observatory's high-energy X-ray eyes were able to peer into a particular site of powerful gamma rays and confirm the source: A spinning, dead star called a pulsar.
NASA's wind-watching ISS-RapidScat ready for launch 18 September 2014, 6:04 pm The fourth SpaceX cargo mission to the International Space Station (ISS) under NASA's Commercial Resupply Services contract, carrying the ISS-RapidScat scatterometer instrument designed and built by NASA's Jet Propulsion Laboratory, Pasadena, California, is scheduled to launch Saturday, Sept. 20, from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida. The one-day adjustment in the launch date was made to accommodate preparations of the SpaceX Falcon 9 rocket and was coordinated with the station's partners and managers.
Comet landing mission: 'J' marks the spot for Rosetta's lander 18 September 2014, 6:00 pm The European Space Agency's Rosetta's lander, Philae, will target Site J, an intriguing region on comet 67P/Churyumov-Gerasimenko that offers unique scientific potential, with hints of activity nearby, and minimum risk to the lander compared to the other candidate sites. The 220-pound (100-kilogram) lander is scheduled to reach the surface on November 11, where it will perform in-depth measurements to characterize the nucleus. Rosetta is an international mission spearheaded by the European Space Agency with support and instruments provided by NASA.