00335cam a22001217a 4500008004000000020001500040082002100055245006900076260002600145300001000171650001400181700001800195180718b1981   xxu||||| |||| 00| 0 eng d  a0517528061  aYA52055 M698 (R)  aThe Cambridge encyclopaedia of astronomycedited by Simon Mitton  aNew YorkbCrownc1981  a481p.  aAstronomy  aMitton, Simon