Suggested Searches

cipher spacewalk

CIPHER

Astronauts headed to the International Space Station can sign up for a broad suite of experiments that will help scientists pinpoint how the human body reacts to long-duration missions in space. The research will help NASA prepare astronauts for missions to the Moon, Mars, and beyond.

Learn More About CIPHER

cipher spacewalk

About CIPHER

Learn about the 14 CIPHER studies examining how multiple systems in the body react to increasingly longer spaceflight missions.

An illustrated render of Earth, the Moon, and the International Space Station is displayed with text reading "Extended Stays in Space" above Earth and the space station. Earth is to the bottom left of the image, with a red line and the space station going around it, to display a trajectory path. Earth's Moon is in the top right corner of the image, with space and stars in the background.

One-Year Missions

Learn about the record-breaking NASA astronauts who spent an extended amount of time in space.

cipher argos

Listen

Learn about the CIPHER studies in an episode of Houston We Have a Podcast.

Latest Content

Stay up-to-date with the latest content from NASA as we explore the universe and discover more about our home planet.

Experiments to Unlock How Human Bodies React to Long Space Journeys
7 min read

Through Artemis, NASA astronauts are returning to the Moon in preparation for one day going to Mars. To better prepare astronauts…

Article
Spaceflight Standard Measures: Characterizing How Humans Adapt in Space
5 min read

Astronauts undergo many adaptations during space expeditions. NASA is collecting a set of consistent core measurements, called Spaceflight Standard Measures, to…

Article
Featured Story

Experiments to Unlock How Human Bodies React to Long Space Journeys

Through Artemis, NASA astronauts are returning to the Moon in preparation for one day going to Mars. To better prepare astronauts…

Read the Story