Space exploration

In this photo provided by NASA astronauts Christina Koch and Jessica Meir exits the International Space Station on Friday, Oct. 18, 2019. The world’s first female spacewalking team is making history high above Earth. This is the first time in a half-century of spacewalking that a woman floated out without a male crewmate. Their job is to fix a broken part of the station’s solar power network.(NASA via AP)

In this photo released by NASA on Thursday, Oct. 17, 2019, U.S. astronauts Jessica Meir, left, and Christina Koch pose for a photo in the International Space Station. On Friday, Oct. 18, 2019, the two are scheduled to perform a spacewalk to replace a broken battery charger. (NASA via AP)

FILE - In this image released Friday, Oct. 4, 2019, by NASA, astronauts Christina Koch, right, and, Jessica Meir pose for a photo on the International Space Station. NASA has moved up the first all-female spacewalk to Thursday, Oct. 17, 2019, or Friday because of a power system failure at the International Space Station. (NASA via AP)

FILE - In this March 26, 1965 file photo, Cosmonaut Alexei Leonov, who stepped into space from the Voskod-2 spaceship, speaks in Moscow, Russia. Alexei Leonov, the first human to walk in space, died in Moscow on Friday, Oct. 11, 2019. He was 85. (AP Photo, File)

This image provided by NASA shows astronauts Andrew Morgan on a spacewalk outside the International Space Station on Friday, Oct. 11, 2019. Morgan and Christina Koch are replacing decade-old batteries in the station’s solar power network with new and improved lithium-ion versions. It’s the second of five spacewalks planned this month to install six new batteries that arrived via a Japanese supply ship two weeks ago (NASA via AP)

In this Oct. 1, 2019 photo made available by NASA, a Northrop Grumman L-1011 Stargazer aircraft takes off from Vandenberg Air Force Base in Calif. The company's Pegasus XL rocket, containing NASA's Ionospheric Connection Explorer (ICON), is attached beneath the aircraft. The explorer is targeted to launch on Oct. 9, 2019, from Cape Canaveral Air Force Station in Florida. ICON will study the frontier of space - the dynamic zone high in Earth's atmosphere where terrestrial weather from below meets space weather above. (Randy Beaudoin/NASA via AP)

NASA Administrator Jim Bridenstine, left, talks with SpaceX chief engineer Elon Musk, right, in front of the Crew Dragon spacecraft, about the progress to fly astronauts to and from the International Space Station, from American soil, as part of the agency's commercial crew program at SpaceX headquarters, in Hawthorne, Calif., Thursday, Oct. 10, 2019. (AP Photo/Alex Gallardo)

This combination of Oct. 8, 2019, photos shows the Nobel Prize winners in Physics, from left, James Peebles in Princeton, N.J., Didier Queloz in London and Michel Mayor in Madrid. Peebles, an emeritus professor at Princeton University, won for his theoretical discoveries in cosmology. Swiss star-gazers Mayor, and Queloz, both of the University of Geneva, were honored for finding an exoplanet — a planet outside our solar system — that orbits a sun-like star, the Nobel committee said. (AP Photo)

In this image made from video provided by NASA, NASA astronauts Christina Koch and Andrew Morgan work outside the International Space Station, Sunday, Oct. 6 2019. The astronauts kicked off the first of five spacewalks to replace old batteries at the International Space Station on Sunday. (NASA via AP)

In this photo provided by the Museum of the Bible, a photo of the Lunar Bible on display at the museum is pictured in an undated photo. The Museum of the Bible in Washington has quietly replaced an artifact purported to be one of a handful of miniature Bibles that a NASA astronaut carried to the moon in 1971 after an expert questioned its authenticity. (Museum of the Bible Collection via AP)