Planetary Brightness Changes: Evidence for Solar Variability
- 7 November 1975
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 190 (4214) , 560-562
- https://doi.org/10.1126/science.190.4214.560
Abstract
Brightness changes of Uranus and Neptune at 440 nanometers were highly correlated from 1956 to 1966. Recent observations of Saturn's satellite Titan and of Uranus and Neptune show a steady brightening at 551 and 472 nanometers since 1972. Either the solar constant is slightly variable or solar activity causes correlated changes in the albedos of planetary bodies.Keywords
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