Das neueste über DAWN:
Die NASA 'news conference' von heute mit den neuesten wissenschaftlichen Daten:
http://www.ustream.tv/recorded/17833902 Sehr interessant
NASA's Dawn: The Science of Vesta NASA participated in a news conference on Wed., Oct. 12, at 10 a.m. PT (1 p.m. ET) to discuss progress of the Dawn mission at giant asteroid Vesta. The briefing was hosted by the Geological Society of America in Minneapolis.
The news conference panelists are:
Carol Raymond, Dawn deputy principal investigator, NASA’s Jet Propulsion Laboratory, Pasadena, Calif.
Paul Schenk, Dawn participating scientist, Lunar Planetary Institute, Houston
Debra Buczkowski, Dawn participating scientist, Applied Physics Laboratory, Johns Hopkins University, Laurel, Md.
Federico Tosi, Dawn Visible and Infrared Spectrometer team member, Italian Space Agency, Rome
Dawn, which has been orbiting Vesta since mid-July, has found that the asteroid's southern hemisphere boasts one of the largest mountains in the solar system. Other findings show that Vesta's surface, viewed by Dawn at different wavelengths, has striking diversity in its composition, particularly around craters. Science findings also include an in-depth analysis of a set of equatorial troughs on Vesta and a closer look at the object's intriguing craters. The surface appears to be much rougher than most asteroids in the main asteroid belt. In addition, preliminary dates from a method that uses the number of craters indicate that areas in the southern hemisphere are as young as 1 billion to 2 billion years old, much younger than areas in the north.
Scientists do not yet understand how all the features on Vesta's surface formed, but they did announce today, after analysis of northern and southern troughs, that results are consistent with models of fracture formation due to giant impact.
http://dawn.jpl.nasa.gov/feature_stories/science_team_early_results.asp
Martin
PS: Die Journalisten im Saal haben aber erstaunlich wenig Fragen.
