The human relay: how the ISS maintains a continuous orbital presence
In short: Space exploration is not a series of isolated trips, but a continuous relay of human presence. Since the turn of the millennium, the International Space Station has been inhabited without interruption, requiring precise handovers between international crews to maintain the world's most complex orbiting laboratory.
The International Space Station (ISS) represents a milestone in long-term human habitation in space. This continuous occupation began with Expedition 1 in the year 2000. Since that inaugural mission, the orbital outpost has remained occupied, hosting over 270 individuals who have lived and worked in microgravity to advance science and technology. Maintaining this presence requires a complex logistical dance of international cooperation and scheduled rotations. For instance, the upcoming Expedition 35 and 36 missions involve a collaborative effort between NASA and the Russian Federal Space Agency (Roscosmos). This specific rotation includes NASA astronaut Chris Cassidy and Roscosmos cosmonauts Pavel Vinogradov and Alexander Misurkin, who are scheduled to launch on a Soyuz spacecraft on March 27 and remain in orbit until September 11.
Modern logistics also rely on a mix of government and commercial partnerships. While the Soyuz spacecraft continues to transport crews, NASA’s Commercial Crew Program utilizes the SpaceX Dragon spacecraft for missions like Crew-11 and Crew-12. These rotations ensure that the station remains stocked with supplies and hardware, such as those delivered by the SpaceX CRS-33 resupply mission, while providing a platform for specialized research like the Cold Atom Lab, which studies ultra-cold quantum gases in microgravity.
The transition between these expeditions is seamless but rigorous. For example, the crew of Expedition 74, which began on December 8, 2025, will eventually give way to Expedition 75 in July 2026. These cycles allow for the steady progression of research, from quantum sensing to studying Earth's biology, ensuring that the ISS remains a functional laboratory rather than a static monument.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: Next ISS Missions Previewed by Crew Members
- Also: International Space Station Expeditions - NASA
To cite this card, link to https://intellectplus.co.uk/app/space-next-iss-missions-previewed-by-crew-members.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Space agencies · More in Space · Latest · A–Z · All topics
