NASA astronaut Chris Cassidy works during a six-hour spacewalk to install lithium-ion batteries on the International Space Station's truss structure.
Expedition 63 Commander Chris Cassidy took this epic "space-selfie" during his fourth spacewalk this year at the International Space Station.
The sun beams just above the Earth's horizon as Expedition 63 Commander Chris Cassidy (center left) conducts his fourth spacewalk…
The sun beams just below the frame as Expedition 63 Commander Chris Cassidy (near center left) conducts his fourth spacewalk…
Expedition 63 Commander Chris Cassidy conducts a spacewalk to set up the Tranquility module for the future installation of a…
Expedition 63 Commander Chris Cassidy conducts a spacewalk to set up the Tranquility module for the future installation of a…
Expedition 63 Commander Chris Cassidy conducts a spacewalk to set up the Tranquility module for the future installation of a…
NASA’s Terra satellite captured this image of fires wreaking havoc across a large swath of Siberia on July 21, 2020.
This week in 1999, space shuttle Columbia, mission STS-93, launched from NASA’s Kennedy Space Center on a four-day mission to…
NASA is developing technologies to send humans to the Red Planet.
