00825nam a2200193Ia 450000100070000000500170000700800410002402000180006524500960008326000820017930000250026149000400028650000910032650400510041765000370046865000480050565000510055370000270060430292120160527184412.0110323s2010    nyua   gr     001 0 eng    a978161530025900aAstronomical observationsbastronomy and the study of deep spacecedited by Erik Gregersen.  aNew YorkbBritannica Educational Publishing;Rosen Educational servicesc2010.  a214 p.bill.c23 cm. 3aAn explorer's guide to the universe  a"In association with Britannica Educational Publishing and Rosen educational Services"  aIncludes bibliographical references and index.00aAstronomyxPopular works.2Local 0aAstronomy instrumentsxPopular works2Local00aAstronomyxObservationsxPopular works.2Local10aGregersen, Erik2Local