Meteorites,Comets and Asteroids
- Jun 3, 2005On July 4, NASA's Deep Impact spacecraft will attempt an extraordinarily daring encounter with the far-flung comet Tempel 1, which is hurtling through space at tens of thousands of miles per hour. As if that is not challenging enough, the comet's size, shape and other
- May 23, 2005The detailed measurements of dusty disks around young stars confirm a new theory that the region where rocky planets such as Earth form is much farther away from the star than originally thought. These definitive measurements of planet-forming zones offer important clues to initial conditions
- Apr 30, 2005An international team of astronomers reports today confirmation of the discovery of a giant planet, approximately five times the mass of Jupiter, that is gravitationally bound to a young brown dwarf. This topic has spawned a year long discussion on the nature of this object.
- Apr 18, 2005Maggie Turnbull, an astronomer with the Carnegie Institution, has spent many years thinking about what kind of stars could harbor Earth-like planets. Her database of potentially habitable star systems could be used as a target list for NASA's forthcoming Terrestrial Planet Finder (TPF) mission.
- Apr 15, 2005When astronomers discovered that the planets around Upsilon Andromedae had very strange orbits, they weren't sure what could have caused it. Researchers from Berkeley and Northwestern have developed a simulation that shows how an additional planet could have given the other planets the orbital kick.
- Apr 11, 2005Maggie Turnbull, an astronomer with the Carnegie Institution, has spent many years thinking about what kind of stars could harbor Earth-like planets. Her database of potentially habitable star systems could be used as a target list for NASA's upcoming Terrestrial Planet Finder (TPF) mission.
- Apr 3, 2005Scientists have explained how a globe-encircling residue formed in the aftermath of the asteroid impact that triggered the extinction of the dinosaurs. The study draws the most detailed picture yet of the complicated chemistry of the fireball produced in the impact.
- Mar 29, 2005Dying stars may warm previously frozen worlds around them to the point where liquid water temperature exists long enough for life to form, according to a new analysis of the evolution of habitable zones around stars by an international team of astronomers.
- Mar 27, 2005In orbit for three and a half years now, ESA's smallest Earth Observation satellite is making a big contribution to science, a workshop heard this week. Proba applications range from studying land vegetation to water quality monitoring, assessing productivity of Italian vineyards, even helping hunt