
On Dec. 21, 1968, the Apollo 8 crew leaves the Kennedy Space Center's then-named Manned Spacecraft Operations Building during the mission's prelaunch countdown on the way to their history-making lunar orbiting flight. via NASA http://ift.tt/2zbwlJX
Westerlund 1 is the biggest and closest “super” star cluster to Earth. Data from Chandra and other telescopes are helping astronomers delve...
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