The International Space Station (ISS)

Source:  ET

Subject:  Science and Technology

Context: The International Space Station (ISS) is planned to be de-orbited in 2030 in a controlled re-entry over a remote ocean area, bringing an end to the longest-running era of continuous human presence in low Earth orbit.

About The International Space Station (ISS):

What it is?

  • The ISS is a permanently crewed, modular space laboratory in low Earth orbit, used for microgravity research, technology testing, and long-duration human spaceflight studies. Humans have continuously lived aboard the station since November 2000.

Launched in:

  • Assembly began in 1998 with the launch of the first module Zarya on 20 November 1998.
  • Continuous habitation started with Expedition 1 in November 2000.

Nations / agencies involved

The ISS is operated through an international partnership of five space agencies:

  • NASA (USA), Roscosmos (Russia), ESA (Europe), JAXA (Japan), and CSA (Canada).

Aim:

  • Enable cutting-edge scientific research in microgravity.
  • Test technologies and human systems needed for deeper space exploration
  • Serve as a platform for international cooperation and an evolving low Earth orbit economy.

Key features:

  • Modular architecture: Built from multiple modules contributed by partner agencies, assembled in orbit over years.
  • Permanent human-tended lab: Supports long-duration stays and continuous experimentation since 2000.
  • Shared governance & interdependence: Each partner manages hardware it provides; station functions through integrated contributions.
  • Planned end-of-life disposal: A dedicated U.S. Deorbit Vehicle will enable a controlled re-entry after 2030 operations conclude.

Significance:

  • ISS research has advanced understanding of human health in space, materials, and Earth-observation-linked applications, while building operational experience for future missions.
  • It remains a major symbol of peaceful international collaboration in space through decades of geopolitical shifts.