Can we infer the presence of multiple planets by monitoring how a star’s brightness changes outside of planetary transit?
How long does planetary migration take? Crockett et al. look for the answer by searching for hot Jupiters around extremely young stars.
Astronomers recently announced the discovery of a short period Earth-mass planet in the Alpha Centauri system. Could Earth-mass planets exist in the habitable zones of binary stars?
Astronomers often refer to elliptical galaxies as “red and dead” because they appear red in color and aren’t currently forming stars. In this paper, the authors present evidence that elliptical galaxies might not be as dead as we assume.