Skywatchers worldwide are in for a charming cosmic display before the Sun rises Friday, as three celestial bodies will appear in close conjunction.

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Astronaut Don Pettit shared what he calls “science of opportunity” to demonstrate how experimenting with our surroundings can ...

Russia's Soyuz MS-26 spacecraft with NASA astronaut Don Pettit and cosmonauts Alexey Ovchinin and Ivan Vagner departed the International Space Station (ISS) for a parachute assisted landing and ...