AGU Meetings Spring and Fall each year.
      Joint Assembly, 27-30 May, 2008 Fort Lauderdale, FL
      Fall Meeting, December 15-19, 2008 in San Francisco

AbSciCon Astrobiology Science Conference Held every other year.
      AbSciCon 2008 April 14-17, 2008, Santa Clara, CA

DPS Division of Planetary Sciences
        of the American Astronomical Society Fall.
      October 10-15, 2008, Ithaca, NY

EGU European Geosciences Union Spring each year.
      General Assembly April 13 - 18, 2008 in Vienna Austria
      COSPAR every other year. July 13-20, 2008, Montreal Canada.

LPSC Lunar and Planetary Sciences Conference March in Houston.
      Other Meetings also listed as well as LPI sponsored workshops.

MetSoc Meteoritical Society Summer.
      July 28 - August 1, 2008, Matsue, Japan