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Keith Cowing Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp veteran, (he/him) 🖖🏻 Follow on

Phase-dependent measurements of Earth’s broadband visual apparent albedo, including historic observations from Danjon (1928). Mission or observing technique is indicated by datapoint color and shape. Uncertainties are indicated, which are

(a) Galileo Solid State Imaging (SSI) false color data of Europa’s leading hemisphere and Tara Regio (credit: NASA, JPL/Caltech, PIA01295). (b) Illustration of chaos on Europa (credit: NASA, GSFC, PIA00840),

Example evolution of an unstable system with 5 one-Neptune-mass planets. Top: the semi-major axes of individual planets are plotted as solid lines. Orbits’ radial extents between pericenter and apocenter are

Earth’s atmosphere — NASA Water vapour is highly subsaturated in much of the Earth’s atmosphere. This has important consequences for water vapour feedback, and also for general phenomena such as