The Russian Academy of Sciences, the Russian Foundation for Basic Research, Saint Petersburg Scientific Center of RAS, the Institute of Applied Astronomy of RAS invite you to participate in the International scientific conference 'Asteroid-Comet Hazard-2009' which will be held 21-25 September 2009 in St. Petersburg. The purposes of the conference are to provide a common forum for experts of diverse background and disciplines to come and exchange information and ideas, to recommend subsequent development of research, to attract public attention to severe hazard due to asteroids and comets approaching the Earth and necessity of more active international cooperation of the research directed to protection of civilization from this hazard.