Orion Mega Mosaic Frame:White Thomas Kast

Thomas Kast

Alidades are sighting devices for determining directions used in surveying and (formerly) astronomy

Used during the 17th and 18th centuries in scientific debate over the relative merits of what was at the centre of the universe – the Sun or the Earth

Happy exploring

then this fascinating and witty book is the perfect antidote

Orion Mega Mosaic Frame:White Thomas KastAstronomy Photographer of the Year is the largest international competition of its kind. Organised by the Royal Observatory Greenwich and sponsored by Insight Investment, the competition receives entries from photographers all around the world. It annually showcases the best space photography from a global community of astrophotographers. "I started taking this photo from Spain in 2011, and after shooting the main central part of the Orion Nebula, I