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
Under NASA's plan, a spacecraft would get to the asteroid in the early 2020s — then pluck a car-sized boulder from the surface and head back toward Earth, to put the boulder in orbit around the moon. NASA hide caption
NASA astronaut Scott Kelly takes a selfie inside the cupola, a special module that provides a 360-degree view of Earth. Kelly and Russian cosmonaut Mikhail Kornienko have spent nearly a year aboard the International Space Station. NASA hide caption
It took 101 takes to get the right shot for Gideon Gidori's Kickstarter video. He hopes supporters will fund his flight school tuition in exchange for a secret potato salad recipe. via Kickstarter hide caption