mei 092013
White Dwarfs "polluted" with Planetary Debris

  The NASA/ESA Hubble Space Telescope has found signs of Earth-like planets in an unlikely place: the atmospheres of a pair of burnt-out stars in a nearby star cluster. The white dwarf stars are being polluted by debris from asteroid-like objects falling onto them. This discovery suggests that rocky planet formation is common in clusters, [continue reading]

jan 202013
Reull Vallis: a Former River on Mars?

  ESA’s Mars Express imaged the striking upper part of the Reull Vallis region of Mars with its high-resolution stereo camera last year. High-Resolution Stereo Camera (HRSC) nadir and colour channel data taken during revolution 10657 on 14 May 2012 by ESA’s Mars Express have been combined to form a natural-colour view of Reull Vallis. Centered at [continue reading]

aug 072012
The Annual Perseid Meteor Shower is Coming Up

  The annual Perseid meteor shower, which will peak on Aug. 11-12, is one of the most popular every year because it happens on warm summer nights, when gazing at the starry sky is always enjoyable. In a clear, dark sky there may be as many as 60 bright meteors per hour, some with smoke [continue reading]

jul 272012
Moon's Formation a Hit-and-Run Scenario

  A new theory of lunar formation suggests Earth was the victim of a hit-and-run incident — and that the culprit may still be at large. Computer simulations suggest a large, fast-moving body impacted the Earth to create the Moon. The origin of the Moon is one of the more important problems for planetary geologists and [continue reading]