Simulations show that the Oort cloud contains eight billion asteroids (in addition to hundreds of billions of comets). Do these asteroids pose a threat to Earth?
There does not seem to be enough mass in protoplanetary disks to build the planetary systems we’ve detected. The solution: planet formation might start sooner than previously thought.
Observational biases may significantly underestimate the lifetime of protoplanetary disks.
Herschel provides an updated look at the debris disk in the popular planetary system, Tau Ceti.
A new hypothesis posits that the ice giant planets formed between the CO and N2 icelines in the Solar System’s protoplanetary disk.
Heat from the proto-Earth may have caused the difference in the Moon’s far- and near-side crust thicknesses.
A new model simulates the composition of growing planetesimals in an evolving protoplanetary disk. The model predicts that carbon-rich terrestrial planets can form more easily than previously thought.
Kepler finds the signature of a transiting white dwarf. Instead blocking the light of its companion star, the white dwarf magnifies it, creating a light curve that periodically brightens.
Vega’s system of debris disks can be explained by a series of planets that constantly transport material inwards towards the star.
The Kepler Space Telescope gets a promising second chance with a new mission called “K2″.