In this handout image provided by NASA, support teams work on the SpaceX Dragon spacecraft shortly after it landed with NASA astronauts Nick Hague, Suni Williams and Butch Wilmore, and Roscosmos cosmonaut Aleksandr Gorbunov onboard on March 18, 2025, off the coast of Florida. Keegan Barber/NASA via Getty Images hide caption
NASA astronaut Josh Cassada recently spoke to Short Wave Scientist in Residence Regina G. Barber from the International Space Station (ISS). As he orbited Earth, they discussed some of the science experiments happening aboard the ISS. The experiments span multiple scientific fields including physics and biology. NASA/Screenshot by NPR hide caption
Astronaut Al Worden circled the moon during the Apollo 15 mission. NASA hide caption
Astronauts Christina Koch (right) and Jessica Meir pose for a photo on the International Space Station on Oct. 4. NASA moved up the first all-female spacewalk because of a power system failure at the space station. NASA via AP hide caption
Some of the space food that was scheduled to be carried on the Apollo 11 lunar landing mission included (from left to right): chicken and vegetables, beef hash, and beef and gravy. Bettmann/Bettmann Archive hide caption
NASA astronaut Anne McClain, attends her final exam at the Gagarin Cosmonauts' Training Centre outside Moscow on Nov. 14, 2018. STR/AFP/Getty Images hide caption
The Chinese lunar lander Chang'e 4 is headed to Aitken Basin, a large impact crater near the moon's south pole, pictured here in blue. The distance from the depths of Aitken Basin to the tops of the highest surrounding peaks is nearly twice the height of Mount Everest, according to NASA. NASA/Goddard hide caption
NASA astronaut Anne McClain (from left), Russian cosmonaut Oleg Kononenko and David Saint-Jacques of the Canadian Space Agency successfully blasted into space on Monday morning. It is the first mission since an aborted launch in October. Kirill Kudryavtsev/AFP/Getty Images hide caption
Astronaut Dick Gordon, a member of the U.S. Astronaut Hall of Fame, attends a 2009 event at Cape Canaveral, Fla. NASA/Jim Grossmann hide caption
"It's not just about making one German astronaut happy with fresh bread," Marcu explains. "There's really a deeper meaning to bread in space." Above, a photo illustration of bread in space. NASA/ Bake in Space GmbH hide caption
NASA astronaut Kate Rubins floats in the International Space Station in September 2016, wearing a spacesuit decorated by patients recovering at the MD Anderson Cancer Center. NASA Johnson/Flickr hide caption
Mae Jemison addresses congressional representatives and distinguished guests at Bayer's Making Science Make Sense 20th anniversary celebration in 2015. Kevin Wolf/AP Images for Bayer Making Science Make Sense hide caption
Apollo 1 astronauts Ed White (from left), Gus Grissom and Roger Chaffee, 1967. The astronauts died as a result of a fire in the cockpit during a training session on Jan. 27, 1967. Keystone/Hulton Archive/Getty Images hide caption