Smaller Gas Giants Could Support Life
Two phenomena known to inhibit the potential habitability of planets - tidal forces and vigorous stellar activity - might instead help chances for life on certain planets orbiting low-mass stars, ... more
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Habitable Evaporated Cores
I recently published a paper in Astrobiology that shows that it is possible to form Earth-mass potentially habitable planets from mini-Neptunes that migrate into the habitable zones of mid- to late ... more
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Cassini Catches Titan Naked in the Solar Wind
Researchers studying data from NASA's Cassini mission have observed that Saturn's largest moon, Titan, behaves much like Venus, Mars or a comet when exposed to the raw power of the solar wind. The o ... more
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Dawn ahead!
NASA's Dawn spacecraft has returned the sharpest images ever seen of the dwarf planet Ceres. The images were taken 147,000 miles (237,000 kilometers) from Ceres on Jan. 25, and represent a new miles ... more
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Kepler astronomers discover ancient star with 5 Earth-size planets
Astronomers poring over four years of data from NASA's Kepler spacecraft have discovered a star that's 11.2 billion years old and has at least five Earth-size planets.
"We thus show that Earth ... more
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Gully patterns document Martian climate cycles
Geologists from Brown University have found new evidence that glacier-like ice deposits advanced and retreated multiple times in the midlatitude regions of Mars in the relatively recent past.
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Several Drives This Week Put Opportunity Near Marathon Distance
Opportunity is on the west rim of Endeavour Crater heading towards "Marathon Valley," a putative location for abundant clay minerals now about 984 feet (300 meters) away.
The project is operat ... more
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