00434nam a22001457a 4500008004100000020001800041050002200059100001900081245005500100250001200155260004900167300002500216500003300241650001400274161027b        xxu||||| |||| 00| 0 eng d  a9780716758044  aQB 43.2 .C66 2004  aComins,Neil F.  aDiscovering the essential Universe/cNeil F.Comins  a2nd ed.  aNew York :bW.H. Freeman and Company,cc2004  avii, 300p. :bill. ;  aIncludes appendix and index.  aAstronomy