Soil, Comets, and Craters

8 Dec 2012

At www.dailygalaxy.com/my_weblog/2012/12/nasa-announces-first-full-mars-soi... ... we learn the Curiosity Rover has taken samples and analysed some soil on Mars - see also www.nasa.gov/mars

At http://phys.org/print274000788.html ... is about Sun grazing comets, in particular, Comet Lovejoy which in December 2011 swept through the Sun's corona with it's long tail stetched out behind - and lived to tell the tale.

Finally, at http://phys.org/print274039467.html ... what created all those gullies on the asteroid, Vesta? These are found on the walls of geologically young craters - nice images sent back by the Dawn spacecraft.