Season 51 Episodes14
Cast1

Patrick Moore
Self - Presenter
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Patrick anticipates the cataclysmic day, in two billion years, when our Milky Way will collide with Andromeda, and the role dark matter will play.

Patrick Moore
Self - Presenter
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"The Grand Collision" is episode 11 of The Sky at Night season 51. It aired on November 4, 2007.