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👁 This mosaic depicts the International Space Station pictured from the SpaceX Crew Dragon Endeavour during a fly around of the orbiting lab that took place following its undocking from the Harmony module’s space-facing port on Nov. 8, 2021.

International Space Station

25

Years in Orbit

280+

Astronauts Visited

NASA Encyclopedia

International Space Station 2026 Calendar

Twenty-five years ago, humanity launched a bold endeavor: to live and work together in space, not for a fleeting time, but continuously. What began as a fragile framework of modules has since grown into the most enduring platform for international cooperation in orbit — the International Space Station.

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👁 Cover for the International Space Station 2026 Calendar highlighting the orbital outpost above the Earth.
For a quarter of a century, the space station has been our classroom, laboratory, and proving ground. Orbiting 250 miles above Earth at 17,500 miles per hour, it has hosted nearly 300 astronauts from across the globe. Together, they have carried out thousands of experiments, yielding advances in medicine, materials science, and climate research. But beyond discovery, the space station has been preparing us for the next great leap.
NASA

Twenty-Five Years on the International Space Station

November 2, 2025, marked a historic milestone: 25 years of continuous human presence aboard the International Space Station.

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INTERNATIONAL SPACE STATION

About the International Space Station

The station was designed between 1984 and 1993. Elements of the station were in construction throughout the US, Canada, Japan, and Europe beginning in the late 1980s.

The International Space Station Program brings together international flight crews, multiple launch vehicles, globally distributed launch and flight operations, training, engineering, and development facilities, communications networks, and the international scientific research community.

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👁 Backdropped by Earth’s horizon and the blackness of space, the International Space Station is featured in this image photographed by an STS-130 crew member as space shuttle Endeavour and the station approach each other during rendezvous and docking activities
Backdropped by Earth’s horizon and the blackness of space, the International Space Station is featured in this image photographed by an STS-130 crew member as space shuttle Endeavour and the station approach each other during rendezvous and docking activities. Docking occurred at 11:06 p.m. (CST) on Feb. 9, 2010, delivering the Tranquility node and its Cupola.

Expedition 74

Expedition 74 began on Dec. 8, 2025, and will end in Summer 2026. The crew will welcome the SpaceX Crew-12 mission in the Spring while continuing to conduct advanced space…

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NASA Blog

Space Station Daily Blog Update

Daily updates from the orbiting laboratory

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👁 NASA astronaut Mike Hopkins in a spacesuit outside of the International Space Station during a spacewalk.
On Dec. 24, 2013, NASA astronaut Mike Hopkins, Expedition 38 Flight Engineer, participates in the second of two spacewalks, spread over a four-day period, which were designed to allow the crew to change out a faulty water pump on the exterior of the Earth-orbiting International Space Station.
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Spot the Station

The Spot the Station mobile app is an official NASA app that helps users track and receive notifications for International Space Station viewings as it passes over their respective location. It also provides real-time tracking, flyover schedules, and alerts.

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👁 The International Space Station is pictured from the SpaceX Crew Dragon Endeavour during a fly around of the orbiting lab that took place following its undocking from the Harmony module’s space-facing port on Nov. 8, 2021.
The International Space Station is pictured from the SpaceX Dragon crew spacecraft during a fly around of the orbiting lab that took place following its undocking from the Harmony module’s space-facing port on Nov. 8, 2021.
ESA / NASA / T. Pesquet

Station Assembly Elements

Explore the International Space Station.

We are driven to explore the unknown, discover new worlds, push the boundaries of our scientific and technical limits, and then push further.

👁 The International Space Station photographed by Expedition 56 crew members from a Soyuz spacecraft after undocking.
The International Space Station photographed by Expedition 56 crew members from a Soyuz spacecraft after undocking. NASA astronauts Andrew Feustel and Ricky Arnold and Roscosmos cosmonaut Oleg Artemyev executed a fly around of the orbiting laboratory to take pictures of the station before returning home after spending 197 days in space. The station will celebrate the 20th anniversary of the launch of the first element Zarya in November 2018.
NASA/Roscosmos
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Brain and Eye Studies, Advanced Life Support Tech Top Station Crew’s Day

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Station Crew Works Robotics, Research as Artemis II Launch Preps Continue

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Medical Tests, Microbiology Top Research Schedule Aboard Station

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ISS: 2025 Calendar

Explore the new International Space Station 2025 calendar and learn more about the one-of-a-kind orbiting laboratory.

Research and Technology

Since the first crew’s arrival aboard over twenty years ago, the International Space Station has evolved into a state-of-the-art scientific lab.

Visiting Vehicles

ESA, JAXA, Roscosmos, Northrop Grumman, and SpaceX, each have launched their own space freighters to resupply the International Space Station. NASA, Roscosmos, SpaceX, and Boeing have also launched their own crew ships to the orbital outpost.

Station Spacewalks

There have been 259 spacewalks at the International Space Station since December 1998.

STEM Resources and Opportunities

Explore hands-on activities, interactive, lesson plans, educator guides, and other downloadable content about the International Space Station.

ISS National Laboratory

In an effort to expand the research opportunities of this unparalleled platform, the space station was designated as a U.S. National Laboratory in 2005 by Congress, enabling space research and development access to a broad range of commercial, academic, and government users. 

Media

10 Images

To view more images, visit the Space Station Gallery.

Space Station Videos

A YouTube playlist containing a variety of videos about the International Space Station.

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👁 Against the black backdrop of the vacuum of space, NASA astronaut Chris Cassidy, entirely shielded by a spacesuit, works on maintenance outside the International Space Station. Using a wrench-type tool in his hands, he makes adjustments to a white outer layer of the orbiting laboratory.