mei 022012
 
Subaru-Led Team Discovers a Stellar Disk of Dusty Quartz

  A research team of Japanese astronomers led by Dr. Hideaki Fujiwara (Subaru Telescope) has discovered a main-sequence star that is surrounded by a rare disk of quartz dust.  Illustration of the HD 15407A System Based on Observations from AKARI and Spitzer.  The dusty quartz disk exists around the star. Collisions of planetesimals, building blocks [continue reading]