Scientific American: Planet Hunters, a recently launched citizen-scientist-powered website, will allow anyone with an internet connection to peruse data gathered by NASA’s Kepler spacecraft. The spacecraft’s telescope gazes at some 150 000 stars to monitor their brightness over several years. If a planet passes across the face of any of those stars, a sort of partial eclipse known as a transit occurs. By recording the resulting dips in brightness, Kepler‘s sensors have already discovered eight exoplanets since the spacecraft’s launch in March 2009. Several hundred more candidates await confirmation. The Planet Hunters website was launched by some of the same people who produced Galaxy Zoo and Moon Zoo.
The finding that the Saturnian moon may host layers of icy slush instead of a global ocean could change how planetary scientists think about other icy moons as well.
Modeling the shapes of tree branches, neurons, and blood vessels is a thorny problem, but researchers have just discovered that much of the math has already been done.
January 29, 2026 12:52 PM
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