Expensive most thing built by Mankind

ISS : Assembled part by part, over a decade, with components launched by various rockets and the NASA Space Shuttle program

Over 3,000 scientific experiments have been conducted on the ISS, advancing our knowledge in various fields. 

ISS is a joint project of five space agencies: NASA, Roscosmos, JAXA, ESA, and CSA, involving 15 countries 

Radio contact with ISS Astronauts are easily made by civilian AMATEUR RADIO Operators from Earth using simple antenna & 2-way Radios

Astronauts experience microgravity, causing their bodies to float &leading to unique health effects like muscle atrophy 

ISS consists of multiple modules, each serving a specific purpose, from laboratories to living quarters. These modules are transported and assembled in space 

Rockets like the Space Shuttle, Russian Soyuz, and SpaceX Dragon regularly fly from Earth to deliver supplies, equipment, & astronauts to the ISS

The ISS is planned for decommissioning by 2031, with plans to safely deorbit it into the Pacific Ocean 

As due to it's aging infrastructure, high maintenance costs, & the need to transition to new technologies

New Players in Space Stations Companies like SpaceX, Blue Origin, and Axiom Space, along with countries like China, are developing the next generation of space stations 

The ISS has been a beacon of international cooperation & scientific advancement, leaving a lasting legacy for future space endeavors