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机译:Comets as collisional fragments of a primordial planetesimal disk
Univ Nice Sophia Antipolis, Dept Lagrange, CNRS, Observ Cote Azur, F-06304 Nice, France;
PAS Space Res Ctr, PL-00716 Warsaw, Poland;
comets: general; Kuiper belt: general; protoplanetary disks; Oort Cloud;