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NASA astronaut and Expedition 72 Commander Suni Williams is attached to the Canadarm2 robotic arm's latching end effector while being maneuvered to her worksite 264 miles above the South Pacific Ocean. Williams removed and stowed a radio frequency group antenna assembly during the five-hour and 26-minute spacewalk outside the International Space Station.

Humans in Space

Building on 60 years of exploration experience and more than two decades of continuous human presence on the International Space Station, NASA will expand humanity’s reach deeper into space than ever before.

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Years Of Exploration

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Active Astronauts

NASA+ Series

Down to Earth

In this original series, NASA astronauts take viewers on a journey to the International Space Station, exploring the life-changing experience of an orbital perspective.

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Star field photograph of the Southern Cross constellation taken from the International Space Station in April 2025.
NASA/Don Pettit

NASA Astronauts

NASA selected the first group of astronauts in 1959. The most recent astronaut candidate group named in Sept. 2025, NASA Class 24, are currently completing training before becoming eligible for flight assignments supporting future science and exploration missions to low Earth orbit, the Moon, and Mars.

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Humans in Space

Human Spaceflight

The Human Spaceflight Mission Directorate leads NASA’s human spaceflight and space-enabling activities across low Earth orbit, the Moon, and beyond. The directorate provides unified leadership for the agency’s systems, operations, and architectures to deliver on the next era of human spaceflight.

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Buzz Aldrin took this iconic image of a bootprint on the Moon during the Apollo 11 moonwalk on July 20, 1969.
Buzz Aldrin took this iconic image of a bootprint on the Moon during the Apollo 11 moonwalk on July 20, 1969.
NASA

Featured Missions

NASA astronaut and Expedition 75 flight engineer Anil Menon is attached to the Canadarm2 robotic arm’s latching end effector during a spacewalk to install a high-speed space-to-ground antenna on the International Space Station’s Z1 truss segment above the Unity module. Menon and ESA (European Space Agency) astronaut and Expedition 75 flight engineer Sophie Adenot (out of frame) spent six hours and 30 minutes replacing a failed antenna with a spare and making the precise connections needed to activate it for high-speed transmissions with mission control.

Expedition 75

Expedition 75 began on July 26, 2026, and will end in spring 2027. The crew will participate in cutting‑edge science happening off Earth — from pioneering in‑space manufacturing and testing augmented‑reality, AI‑powered health tools to advancing the frontier of bioprinting human tissue in microgravity.

Four astronauts are pictured in orange Orion Crew Survival System suits. The astronauts on the far left and far right of the image are standing, holding their helmets. In between them, are the other two astronauts, who are seated and holding their gloves.

Artemis III

Artemis III will carry out a series of objectives in low Earth orbit designed to demonstrate critical systems needed for future lunar landings, beginning with Artemis IV. During the mission, the SLS (Space Launch System) rocket will launch four crew members aboard the Orion spacecraft from Kennedy Space Center in Florida.

Artist's rendering of an astronaut looking through a habitat window as a lunar lander descends toward the Moon's surface, kicking up clouds of lunar dust. Earth appears low on the horizon against the blackness of space.

Moon Base

The Moon Base is humanity’s first lunar outpost, a place where astronauts will live, work, and explore near the Moon’s South Pole. Through a series of crewed and uncrewed missions, NASA and its partners will build the infrastructure needed to support an enduring human presence on the Moon, unlock new scientific discoveries, and prepare for future exploration of Mars.