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International Year of Astronomy - IYA2009
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Why is Pluto no longer a planet?
It happened on 24 August 2006: instead of the nine planets it had up to that time, our Solar System suddenly had only eight – the planet Pluto was no longer a planet. What happened?
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Last update: 28/10/2009 15:39:08
Exhibition "Out of this World"
International Year of Astronomy 2009
CosmicDiary - Astronomy Blogs
Daily Podcasts at 365 Days of Astronomy
ESA - IYA2009
Planetariumshow "Touching the Edge of the Universe"
Archive: Astronomy Questions of the Week