Human Time in Space

Tracking every person-month humanity has spent beyond the Karman line, from Gagarin's 108 minutes in 1961 to over 208 cumulative person-years today.

Person-Months per Year

Cumulative Person-Years in Space

Notable Milestones

  1. 1961 — First human in space: Yuri Gagarin orbits Earth aboard Vostok 1
  2. 1969 — First humans on the Moon: Apollo 11 lands Armstrong and Aldrin
  3. 1971 — First space station: Salyut 1 hosts a 23-day crew
  4. 1973 — Skylab era: Three crews spend up to 84 days aboard America's first station
  5. 1981 — Space Shuttle era begins: Columbia's maiden flight ushers in reusable spacecraft
  6. 1986 — Mir station launched: Continuously occupied for most of its 15-year life
  7. 2000 — Continuous human presence begins: ISS Expedition 1 arrives; humans have been in space ever since
  8. 2021 — New era: SpaceX Crew Dragon begins regular ISS rotations, Chinese Tiangong station crewed — 10+ people in orbit simultaneously
Methodology

Human months in space measures cumulative person-time spent beyond the Karman line (100 km altitude). One person-month equals one person spending ~30 days in space. If 3 crew members spend 60 days in orbit, that's 6 person-months.

The dataset covers 386 individual missions from Vostok 1 (April 1961) through early 2026, including all orbital flights and qualifying sub-orbital flights that crossed 100 km. For missions spanning year boundaries, person-days are split proportionally between calendar years.

Data compiled from Spacefacts.de, NASA records, and public spaceflight databases. The 2026 figure is partial (through February).