The system works well, and millions rely on it every day, but what tells the GPS satellites where they are in the first place? "For GPS to work, the orbital position, or ephemeris, of the...
Information Technology |Physics professors Dastgeer Shaikh and Gary Zank of the university’s Center for Space Plasma and Aeronomic Research and Department of Physics said the model explains how density of the interplanetary ...
Physics and Astronomy |The prototype consisting of a laser head and electronics is extremely compact and weighs only 187 g. The laser system can be used in a so called "Laser Induced Breakdown Spectroscopy" (LIBS)...
Process Engineering |"In 2009, cosmic ray intensities have increased 19% beyond anything we've seen in the past 50 years," says Richard Mewaldt of Caltech. "The increase is significant, and it could me...
Physics and Astronomy |"It's like something else is heating the atmosphere besides the sun. This discovery is like finding it got hotter when the sun went down," said Larry Lyons, UCLA professor of atmospheri...
Earth Sciences |The project, called the Constrained Vapor Bubble (CVB), could yield important fundamental insights into the nature of heat and mass transfer operations that involve a phase change – such as evaporatio...
Physics and Astronomy |When directed toward our planet, these ejections can be breathtakingly beautiful and yet potentially cause damaging effects worldwide. The brightly colored phenomena known as auroras -- more commonly ...
Physics and Astronomy |More recently, scientists have found that the absence of gravity is causing astronauts on the International Space Station to lose up to 10 times more bone mass in key regions of the body each month th...
Health and Medicine |The Hong Kong Polytechnic University (PolyU) is working closely with the well-established Russian Space Agency in designing a state-of-the-art space tool which will be carried onboard a Russian spacec...
Physics and Astronomy |The International Mineralogical Association has named a new mineral, the first to be discovered in a particle from a comet, in honor of Donald Brownlee, a University of Washington astronomer who revol...
Physics and Astronomy |"Wherever man boldly goes his microbial fauna is sure to follow," said Lewis Dartnell, an astrobiologist at University College London. The Russian space station Mir was launched in 1986 and ...
Life Sciences |University of Alberta scientist Carlos Lange is still amazed that an instrument he dreamed up, a wind sensor called the Telltale, will soon be landing on Mars. This is the first time Canadians...
Physics and Astronomy |Cerro Paranal, home of ESO's Very Large Telescope, is certainly one of the best astronomical sites on the planet. Stunning images, obtained by ESO staff at Paranal, of the green and blue flashes,...
Physics and Astronomy |Using data collected at Jupiter by the Galileo spacecraft, Dr Richard Horne of British Antarctic Survey (BAS) and colleagues from the University of California, Los Angeles, and the University of Iowa ...
Physics and Astronomy |Dr Robert Smith, Emeritus Reader in Astronomy, said his team previously calculated that the Earth would escape ultimate destruction, although be battered and burnt to a cinder. But this did not take i...
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