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.
New dynamical simulations show that close-in planets on eccentric orbits can arise from planet-planet scattering — but only if the scattering occurs on larger orbits and is followed by inward migration.
The recent discovery of young stars in the Milky Way’s galactic bulge have raised new questions about galaxy formation. In this paper, a new simulation shows that such stars could be an outcome of natural evolution in the disc over time.
How do simulations of galaxy formation stack up against each other and against observations? Find out with the Aquila project, a comparo of many different codes in current use.
How do so many hot jupiters come to orbit backwards?
Field lines are a powerful tool for building intuition for a complex geometric object.
What happens when an astrophysical jet moving at enormous speeds plows into the gas and dust around it? Some of that matter gets dragged along for the ride — and according to this author, this process could create the two different types of jets that we see.
There’s a new space telescope on the block, which just might find as many new planet candidates as the Kepler mission.
Dust traps may be the key to forming Kepler-16b and other circumbinary planets.
Astronomers love to ignore magnetic fields. But they may strongly affect the pattern of atmospheric circulation in hot Jupiters.