Strongly magnetized rocks on Mars are primarily concentrated in the southern hemisphere. This paper raises a serious objection to the hypothesis that localized dynamo action in the ancient martian core explains this puzzling observation.
For planets too old for plate tectonics, a companion planet could drive tidal heating to keep conditions primed for life.
Large plumes of water vapor were recently found on the dwarf planet Ceres in the asteroid belt. Using Ceres’ rotation, astronomers have located two possible sources for the water vapor on the surface.
A new model explains the common 0.1 bar temperature minimum in certain types of planetary atmospheres.
How do so many hot jupiters come to orbit backwards?
A headline-grabbing paper calculated the prevalence of Earth-sized planets with long orbital periods around Sun-like stars. But are these planets anything like Earth?
In search of a good origin story for the building blocks of life, the authors of this paper have set their sights higher. Literally higher, to exoplanets’ skies.
The Mars rover Curiosity found significant traces of water in the martian soil. This indicates the soil contains water, about 2% by weight.
Lots of people said lots of interesting things during the anniversary celebration for Caltech’s planetary science department.
NASA is looking for a new mission for the damaged Kepler space telescope. Here are some ideas.