Astronomy. Extraterrestrial material--virtual or real hazards?
Milani
Andrea
A
Dipartimento di Matematica, Universite de Pisa , Via Buonarroti 2, 56127 Pisa, Italy. milani@dm.unipi.it
D018534:Earth, Planet; D038622:Internationality; D019110:Meteoroids; D018543:Minor Planets; D011336:Probability; D012306:Risk; D018570:Risk Assessment; D014481:United States; D018557:United States National Aeronautics and Space Administration