description International Space Station Overview
The International Space Station represents a collaborative achievement in space exploration. It’s a permanently crewed research facility orbiting Earth within Low Earth Orbit (LEO). Constructed by multiple international partners, including NASA, Roscosmos, and ESA, the station serves as a unique platform for scientific experiments in microgravity and supports long-duration human spaceflight. Primarily utilized by astronauts and cosmonauts, it facilitates advancements across disciplines like biology, physics, and medicine.
insights Why this score
International Space Station ranks #19 of 212 in the Space Mission ranking, behind Apollo 12, ahead of Mars Exploration Rover Opportunity.
help International Space Station FAQ
What is the International Space Station and who built it
The ISS is a permanently crewed orbital research platform in Low Earth Orbit built through international partnership. Major contributors include NASA, Roscosmos, and ESA, with many programs coordinated around long-duration science work.
How long has the ISS been continuously inhabited
Continuous human presence began in 2000 and has continued across rotating crews since then. This uninterrupted occupation is one of the ISS’s defining historical milestones.
Why was the ISS assembled from multiple modules instead of one launch
No single rocket could deliver the entire station as a complete integrated system, so modules were launched in phases and assembled in orbit. That is why you see contributions from many agencies in the station architecture.
What is one practical reason it remains central to research
Its orbit allows repeated microgravity experiments in biology, materials, and fluid systems that cannot be replicated on Earth for long-duration runs. The station’s 400 kilometer altitude range makes regular crew and cargo rotation feasible.
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