by Emily Lakdawalla
Follow the thrilling adventures of planetary missions, past and present, and see the stunningly beautiful photos that they return from space!
• January 28, 2011
In the past week there have been 25th anniversaries of two events in 1986, one great, one terrible: the closest approach of Voyager 2 to Uranus on January 24, and the explosion of the space shuttle Challenger upon liftoff on January 28.
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