What are the peculiar type-R stars made? Where does the carbon present in their shell come from? These are the questions to be solved by a research work conducted by scientists of the department of Theoretical and Cosmos Physics of the University of Granada (Spain), where they have analysed the chemical composition and the evolutionary state of spectral type R carbon stars to try to explain the origin of the carbon enrichment present in its atmosphere.
Two University of Iowa researchers have made the first direct radio image of a stellar coronal loop at a star, other than the sun, thereby providing scientists with information that may lead to a better understanding of how such phenomena as space weather affect the Earth.
Tropical Storm Edzani will soon be Extra-tropical Storm Edzani and NASA's Tropical Rainfall Measuring Mission or TRMM satellite noticed that as its changing, the storm's rains are all south of the system. Earlier today, January 13, Tropical cyclone Edzani was located approximately 785 nautical miles east-southeast of La Reunion Island in the Southern Indian Ocean, near 28.1 South and 68.0 East. Edzani had maximum sustained winds near 40 mph, so it is still hanging onto tropical storm status as it continues changing into an extra-tropical storm.
For more than two decades, the cold dark matter theory has been used by cosmologists to explain how the smooth universe born in the big bang more than 13 billion years ago evolved into the filamentary, galaxy-rich cosmic web that we see today.
Astronomers have found a giant magnetic loop stretched outward from one of the stars making up the famous double-star system Algol. The scientists used an international collection of radio telescopes to discover the feature, which may help explain details of previous observations of the stellar system.
"This is the first time we've seen a feature like this in the magnetic field of any star other than the Sun," said William Peterson, of the University of Iowa.
PASADENA, Calif.—Astronomers from the California Institute of Technology (Caltech) and other institutions, using the highly sensitive 10-meter Keck I telescope atop Hawaii's Mauna Kea, have detected an extrasolar planet with a mass just four times that of Earth. The planet, which orbits its parent star HD156668 about once every four days, is the second-smallest world among the more than 400 exoplanets (planets located outside our solar system) that have been found to date. It is located approximately 80 light-years from Earth in the direction of the constellation Hercules.
"The spectrum of a planet is like a fingerprint. It provides key information about the chemical elements in the planet's atmosphere," says Markus Janson, lead author of a paper reporting the new findings. "With this information, we can better understand how the planet formed and, in the future, we might even be able to find tell-tale signs of the presence of life."
The first complete version of Greenroads is now available at www.greenroads.us. Muench presented the project today at the Transportation Research Board's annual meeting in Washington, D.C.
The rating system was developed during the past three years by the UW Greenroads team and collaborators at CH2M Hill.
Ever since NASA's Interstellar Boundary Explorer, or IBEX, mission scientists released the first comprehensive sky map of our solar system's edge in particles, solar physicists have been busy revising their models to account for the discovery of a narrow "ribbon" of bright emission that was completely unexpected and not predicted by any model at the time.
For the first time, two astronomers have explained the diversity of galaxy shapes seen in the universe. The scientists, Dr Andrew Benson of the California Institute of Technology (Caltech) and Dr Nick Devereux of Embry-Riddle University in Arizona, tracked the evolution of galaxies over thirteen billion years from the early Universe to the present day. Their results appear in the journal Monthly Notices of the Royal Astronomical Society.
This week PLoS Medicine publishes the second in a four-part series of policy papers examining the ways in which global health institutions and arrangements are changing and evolving.
In this second paper, Julio Frenk, Dean of the Harvard School of Public Health, discusses the crucial role of national health systems in making progress in global health.
(CHICAGO) – For adults and children diagnosed with celiac disease, the only treatment is a gluten-free diet, which can be very challenging. Gastroenterologists at Rush University Medical Center are conducting a new study to see if mind/body techniques could help patients with celiac disease adhere to the very strict diet.
The weekend wasn't very helpful to Edzani, once a powerful Cyclone, now weakened to a tropical storm in the Southern Indian Ocean. That's because of cooler waters and increased wind shear.
To the gardening world it may have always been considered a fact, but science has never proved the widely held belief that watering your garden in the midday sun can lead to burnt plants. Now a study into sunlit water droplets, published in New Phytologist, provides an answer that not only reverberates across gardens and allotments, but may have implications for forest fires and human sunburn.
Physicists may see data as soon as late summer from the prototype for a $278 million science experiment in northern Minnesota that is being designed to find clues to some fundamental mysteries of the universe.
But it could take years before the nation's largest "neutrino" detector answers the profound questions that matter to scientists.