منابع مشابه
Whither Do the Microlensing Brown-dwarfs Rove?
The EROS and MACHO collaborations have reported observations of light curves of stars in the Large Magellanic Cloud that are compatible with gravitational microlensing by intervening massive objects, presumably BrownDwarf stars. The OGLE and MACHO teams have also seen similar events in the direction of the galactic Bulge. Current data are insufficient to decide whether the Brown-Dwarfs are dark...
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The strategic importance of technological improvements in US military capability is a key but insufficiently examined issue in the transformation of today’s military. Is the present Department of Defense (DOD) attempt at transformation, which focuses on technological solutions to increase capabilities, being misguided by a vision of a high-tech Revolution in Military Affairs (RMA)? This questio...
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Context. Using Greenwich sunspot data for 120 years it was recently observed that activity regions on the Sun’s surface tend to lie along smoothly changing longitude strips 180◦apart from each other. After critique of the original paper, the new arguments were found to substantiate the claim. Aims. In this paper we analyse new arguments in some detail. Methods. To check basic arguments about pe...
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We show that solar neutrino experiments set an upper limit of 7.8% (7.3% including the recent KamLAND measurements) to the fraction of energy that the Sun produces via the CNO fusion cycle, which is an order of magnitude improvement upon the previous limit. New experiments are required to detect CNO neutrinos corresponding to the 1.5% of the solar luminosity that the standard solar model predic...
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ژورنال
عنوان ژورنال: The Physics Teacher
سال: 2011
ISSN: 0031-921X
DOI: 10.1119/1.3543582