Skywatchers can catch a rare glimpse of Comet Lemmon this month, and it won't be back until around the year 3175. Here's how ...

High above the Sun’s blazing equator lie its mysterious poles, the birthplace of fast solar winds and the heart of its ...

Who's up for a rocket launch this week? Weather permitting, a SpaceX Falcon 9 rocket should be visible from the Treasure and ...

"Capturing another satellite like this in an Earth-observation image is extremely rare." One of SpaceX's broadband-beaming Starlink satellites has been captured overflying a top-secret airbase in ...

Humanity's first look at Earth from the moon didn't come until Aug. 23, 1966, when this grainy, black-and-white image showed our planet as a crescent above the lunar horizon, appearing to rise as the ...