The International Space Station is back to full strength with the arrival of four new astronauts.

The replacements for the astronauts involved in NASA's first medical evacuation are on their way to the International Space Station.

An astronaut who missed out on the first all-female spacewalk is getting her chance six years later.

NASA astronauts Butch Wilmore and Suni Williams aren’t the first to run late in space, and their 9 ½-month mission falls short of any endurance record.

NASA is counting down toward a Saturday launch of its new moon rocket, its second attempt in a week.

Four minority companies were selected to develop solutions to tackle aerospace-related challenges, in partnership with NASA, DivInc and Houston’s new innovation hub The Ion.

They are the same astronauts who made history after successfully completing the very first all-female spacewalk in October. At the end of the spacewalk, Meir congratulated the newest class of astronauts who graduated last Friday. Koch arrived on the International Space Station on March 14 for her first spaceflight mission. As with the previous spacewalk, the female voice heard speaking to Meir and Koch belongs to NASA astronaut Stephanie Wilson. NASA said Wednesday’s spacewalk is the 225th conducted at the International Space Station.