In this mage from June 2002, astronaut Franklin R. Chang-Diaz works with a grapple fixture during a spacewalk to perform work on the International Space Station.
This 2019 photo of Manhattan, taken by astronaut Nick Hague from aboard the International Space Station, shows a city totally recovered from the attack on September 11, 2001.
On Sept. 4, 2019, a loose chain of tropical cyclones lined up across the Western Hemisphere.
NASA astronaut Christian Koch snapped this image of Hurricane Dorian as the International Space Station during a flyover on Monday, September 2, 2019.
NASA cleared a milestone in preparation for Green Run testing of its Space Launch System (SLS) core stage with the lift and installation of the core stage pathfinder simulator onto the B-2 Test Stand.
West Point graduate, physician and NASA astronaut Andrew Morgan is pictured working outside the International Space Station .
This Hubble image shows a dark, gloomy scene in the constellation of Gemini (the Twins). The subject of this image confused astronomers when it was first studied — rather than being classified as a single object, it was instead recorded as two objects, owing to its symmetrical lobed structure.
Amazon rainforest fires causing smoke to drift across the whole of Brazil.