How NASA's Lunar Trailblazer will make a looping voyage to the moon
Before arriving at the moon, the small satellite mission will use the gravity of the sun, Earth, and moon over several months ...
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Watch How NASA Sends Communicates With Voyager 2
Just over 50 years ago, paleontologist Donald Johnson unearthed the remains of "Lucy," an ancient human relative who lived more than 3 million years ago. Now, another group of scientists have found ...