A Space Milestone: NASA Marks 25 Years of the International Space Station

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 November 8, 2021. Credit: NASA

NASA marks the 25th anniversary of the ISS with a live event on December 6. The ISS, operational since 1998, has been key to space research and exploration, hosting 273 astronauts and over 3,300 research projects.

NASA is celebrating the 25th anniversary of International Space Station operations during a live conversation with crew aboard the microgravity laboratory for the benefit of humanity. During a space-to-Earth call at 12:25 p.m. EST (9:25 a.m. PST) on Wednesday, December 6, the Expedition 70 crew will speak with NASA Associate Administrator Bob Cabana and Joel Montalbano, space station program manager.

Watch on the NASA+ streaming service at no cost on demand. The discussion also will air live on NASA Television, the NASA app, YouTube, and the agency’s website. Learn how to stream NASA TV through a variety of platforms including social media.

On December 6, 1998, the first two elements of the orbital outpost, Unity and Zarya, were attached by crew members of space shuttle Endeavour’s STS-88 mission. Cabana was the commander of the mission and the first American to enter the space station.

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 November 8, 2021. Credit: NASA

Through this global endeavor, astronauts have continuously lived and worked aboard the space station for more than 23 years, testing technologies, performing science, and developing the skills needed to explore farther from Earth. It has been visited by 273 people from 21 countries.

More than 3,300 research and educational investigations have been conducted on station from 108 countries and areas. Many of these research and technology investigations benefit people on Earth, and many lay the groundwork for future commercial destinations in low Earth orbit and exploration farther into the solar system. Together with Artemis missions to the Moon, these proving grounds will help prepare NASA for future human exploration of Mars.