Fairy Castles on the Moon?

June 30th, 2006

The Moon!

An interesting article on the NASA website talks about the behaviour of shadows on the moon. One phenomenon astronauts observed is a glowing halo around the shadows cast by their helmets. This is the ‘Opposition Effect’ – caused by tiny grains of moondust sticking together to make fluffy tower-like structures, which researchers have christened ‘Fairy Castles’. Intriguing stuff – you can read the full article here.


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