Physics
Scientific paper
Sep 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974lastr..88..285d&link_type=abstract
L'Astronomie, vol. 88, Sept. 1974, p. 285-291. In French.
Physics
Jupiter (Planet), Mariner Venus-Mercury 1973, Mercury (Planet), Pioneer 10 Space Probe, Space Exploration, Venus Atmosphere, Astrometry, Astronomical Photography, Atmospheric Physics, Planetary Magnetic Fields, Planetary Surfaces, Topography
Scientific paper
Some of the principal new data obtained by Pioneer 10 and Mariner 10 are summarized. Pioneer 10, which flew by Jupiter in late 1973, came across high-energy particle fluxes whose integrated energy reached 200,000 rads for electrons and 50,000 rads for protons. Jupiter's magnetic field was found to be strong enough to deflect the solar wind. Jupiter itself appears to radiate 2.5 times as much energy as it receives from the sun. Mariner 10 obtained very precise photographic documentation in UV on the Venusian atmosphere during periods of two atmospheric rotations (8 days). High-resolution photography of Mercury's topology from a height of about 200,000 km from the surface revealed many lunar-like features. Only a weak (90 to 100 gamma) magnetic field was detected, and there seems to be no ionosphere or atmosphere on Mercury.
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