In Autumn Dance Size:small the shadow of central bar

the shadow of central bar (gnomon) will mark the hours on the inside of the circle

Shop for astronomy guides

Empire of Cotton: A New History of Global Capitalism by Sven Beckert is a history of the overwhelming role played by cotton in dictating the shape of our world

don’t move’ to Floyd for the whole 10 seconds

In Autumn Dance Size:small the shadow of central barAstronomy 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. "This is a panoramic photo of polar light over the Siberian forest tundra. The photo consists of eight vertical