Video clips document the spacewalk from start to finish, showing the pair at work during their seven-hour mission in the vacuum of space.
A look at those to have been named as nominees for the coveted prize, before the winner is revealed later in the year.
The photograph was taken by one of the astronauts onboard as the space station flew over the Caribbean Sea.
The Richard Branson-founded space tourism company announced today it has signed a Space Act Agreement with NASA's Johnson Space Center—and shares jumped 13 percent in premarket trading.
Cold Atom Lab experiment led to the production of Bose–Einstein condensates.
Before launching astronauts to the International Space Station, great care is already taken to prevent the crew from bringing potentially dangerous viruses and pathogens onboard with them.
Red romaine grown on board the International Space Station found to be just as good as plants cultivated on Earth.
The Mississippi River Delta, visible in the images, is the seventh largest river delta on Earth.
During the mission, Koch took part in what was the first all-female spacewalk alongside NASA astronaut Jessica Meir.
The volcano is infamous for a catastrophic eruption in 79 A.D. that destroyed the Roman settlements of Pompeii, Herculaneum, Oplontis and Stabiae.
"Australia. Our hearts and thoughts are with you," Koch wrote in a Twitter post.
The research could expand our understanding of how plants react to the stresses of space travel.
The photo was snapped by Jessica Meir, who took part in the first all-female spacewalk last month.
The explosion occurred on the surface of a pulsar around 11,000 light-years away.
The composite image was made of over 400 photos taken as the International Space Station moved over Namibia to the Red Sea.
The spacewalk is expected to last more than five hours, according to NASA.
This is the first time in over fifty years of space exploration that two women will space-walk at the same time.
An astrophysicist told Newsweek the walk "represents years of dedication, study, hard work, and pushing limits and that is truly inspirational."
To create the cultivated beef steaks, an Israeli start-up devised a method which mimics the natural process of tissue regeneration inside a cow's body.
Roscosmos had previously suggested a man-made hole in the Soyuz spacecraft caused an air leak on board the International Space Station in August 2018.
People all across the U.S. should be able to see the station as long as skies are clear.
NASA's Image of the Day shows an interesting circular cloud formation, taken above the Pacific Ocean on April 4, 2019 by an astronaut in the ISS.
Pitt plays an astronaut in the upcoming space opera Ad Astra, which will be in cinemas across the United States on September 20.
Skybot F-850, also known as Fedor, left Earth on the Soyuz-2.1a rocket late Wednesday night.
The main aim of the spacewalk is to install a special piece of equipment which will enable the space station to accommodate new spacecraft designed by private companies.
Skybot F-850, also known as Fedor, will take off from Baikonur on the Soyuz spacecraft on August 22.
The volcano—located in the North Pacific—has long been dormant, with its last eruption occurring in 1924.
The space agency investigates new ways to grow plants in space to offer astronauts an alternative to processed food during long missions.
They're the first astronauts to launch to the station since the October mission that ended in an emergency crash landing.