Planetary Science Research Discoveries -- PSRD http://www.psrd.hawaii.edu PSRD is an educational site sharing the latest research by NASA-sponsored scientists on meteorites, asteroids, planets, moons, and other materials in our Solar System. en-us Meteoritic Minerals Tell a Story of Multistage Cooling, Break-up, and Reassembly of an Asteroid http://www.psrd.hawaii.edu/April13/multistage-cooling.html Compositional variations in minerals in H-chondrites indicate at least two vastly different cooling rates at different temperatures, suggesting fragmentation, cooling of the fragments, and reassembly into a second-generation rubble pile. http://www.psrd.hawaii.edu/April13/multistage-cooling.html Wed, 1 May 2013 01:33:00 GMT