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A sample return mission is a spacecraft mission with the goal of collecting and returning with tangible samples from an extraterrestrial location to Earth for analysis.
For most of its 4.5 billion-year lifetime, Wild 2 probably had a more distant and circular orbit.
Stardust was a 300-kilogram robotic space probe launched by NASA on February 7, 1999.
A number of significant scientific events occurred in 2014. The United Nations declared 2014 the International Year of Family Farming and Crystallography.
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