When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

See footage of the Orion Spacecraft a little over an hour before its "outbound powered flyby burn". The spacecraft was less than 4,500 miles away (7,242 km) and was traveling at 757 miles per hour ...

NASA's commercial partners have mounted a vigorous defense of the Artemis moon mission plans amid the specter of changes from ...

From Copenhagen's Little Mermaid to Scotland's Loch Ness, uncover seven magical destinations filled with mythology and ...