Vanishing world: could the first planet discovered around a sunlike star be a mirage?
Article Abstract:
David F Gray believes that spectral oscillations from 51 Pegasus represents a novel stellar Doppler shift pattern instead of an orbiting planet. However, Michel Mayor and Didier Queloz still believe that spectral patterns from the star is indicative of an orbiting planet.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 1997
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Radar range
Article Abstract:
NASA has developed a space-shuttle radar system that helps create maps of the earth. Radar maps of the Pishan region in northwest China, the Karakax Valley in western China and the Missouri River are shown.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 1996
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