In February 2025, conditions were just right to catch a "planetary party" above the European Southern Observatory's (ESO) ...
Meganne Christian describes what it's like to undergo her first block of astronaut training at the European Astronaut Centre in Cologne, Germany.
On Oct. 1, 1847, at age 29, Maria Mitchell, a studious and sturdy Quaker who, as a child, began sweeping the sky above ...
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