Planet-planet scattering can either be a good thing or a bad thing for the planetesimals caught in the crossfire. Like many things in life, the key is moderation. The authors of this paper try to figure out how many exoplanet systems with eccentric planets are likely to still have their debris disks after experiencing a planet-planet scattering event.
Artist’s impressions of exoplanets are often wrong!
The longest-lasting, most energetic explosions in the universe might occur in rare stars very similar to the very first stars to form in the universe.
Is CoRoT-7d real, or is it stellar activity masquerading as a planet? Haywood et al. build a noise model to analyze CoRoT-7′s activity to find out.
Gas in clusters is predicted to cool quickly, but observations suggest otherwise. What prevents the gas from cooling? The authors explore the incidence and impact of heating by active galactic nuclei.
Astronomers hope to get lucky and discover the first evidence of plate tectonics on a planet besides Earth: remnants of continental crust in the rocky material that pollutes some white dwarfs.
A new hypothesis posits that the ice giant planets formed between the CO and N2 icelines in the Solar System’s protoplanetary disk.