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English astronomer Ian Ridpath is the editor of the Oxford Dictionary of Astronomy and Norton's Star Atlas. He is a recipient of the Astronomical Society of the Pacific's Klumpke-Roberts Award for outstanding contributions to the public understanding and appreciation of astronomy. Wil Tirion is a Dutch celestial cartographer, widely regarded as the world's leading exponent of his art. He is the author of The Cambridge Star Atlas and Sky Atlas 2000.0.
