Collins Gem – Stars - Tapa blanda

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Ian Ridpath and Wil Tirion are authors of the ‘Collins Pocket Guide to the Stars and Planets’ and ‘The Monthly Sky Guide’ (CUP). Ian is editor of ‘Norton’s Star Atlas’ and the ‘Oxford Dictionary of Astronomy’, and author of ‘Satr Tales’. Wil is author of ‘Sky Atlas 2000‘