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Science29 mars 2014
© REUTERS/Aaron Kingery/NASA/MSFC/HandoutPlanquez vous les Martiens !
Astronomie : la comète Siding Spring se dirige vers Mars, mettant la planète en danger
Le 19 octobre 2014 Siding Spring va frôler la planète rouge à 140 000 kilomètres de distance. La chevelure de la comète, qui pourrait être active à cette distance du Soleil, pourrait balayer Mars à plus de 50 km/s.
