The eyes aboard the Mars rover Spirit are delivering ground truth.
After more than six months of examining the photographic and spectral data from the rover, Mars mission scientists confirm that the albedo -- which is the percentage of sunlight reflected on the red planets dusty surface -- indicates important variations in mineral and dust composition.
"Spirit landed in a medium brightness region of Gusev crater, and on this mission has crossed into brighter and darker areas travelling to Bonneville crater and beyond," says Jim Bell, associate professor of astronomy at Cornell University and the lead scientist on the high-resolution, color, stereo panoramic cameras, known as Pancams, carried by Spirit and its twin rover, Opportunity. Says Bell, "The albedo changes that we noticed with Pancam correlate with the changes seen from the Mars orbiters above. This is ground-truth information." (Bonneville was the first crater the rover examined after its landing.) The albedo findings are detailed in a research paper, which, along with 10 other papers resulting from Spirits journey across the Martian surface, are published this week in a special issue of the journal Science (Aug. 6, 2004). The issue, in which 120 authors -- including several from Cornell -- participate, features a 2-foot long, eight-fold poster of Pancam views of Spirits landing site in Gusev crater.
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What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...
For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.
Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...
At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.
No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...
Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.
Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...
The oceans are the largest global heat reservoir. As a result of man-made global warming, the temperature in the global climate system increases; around 90% of...
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