Heiwa

Heiwa (平和, Peace) is a in low Ordic orbit. A joint project between Chisei and Yamatai, Heiwa is also open to use by other nations around the world. Heiwa is one of the first modular space stations, and was assembled in orbit from 1992 to 2012 by Chisei's Onmyōryō and Yamatai's UKAJI space agencies. One of the largest artificial satellites in orbit, the station serves as a microgravity research laboratory in which crews conduct experiments in biology, human biology, physics, astronomy, meteorology and spacecraft systems with a goal of developing technologies required for permanent occupation of space.

Heiwa was the first continuously inhabited long-term research station in orbit and holds the previous record for the longest continuous human presence in space at 3,644 days. It holds the record for the longest single human spaceflight, with Hibiki Tatsunami spending 437 days and 18 hours on the station between 1994 and 1995. Heiwa today has the capacity to support a resident crew of three to seven, or larger crews for short visits.

Following the success of the Chiseian space station programme, Heiwa represents the next stage in Chisei's space station programme and the first foray into manned space stations for Yamatai. The first module of the station, known as the core module or base block, was launched in 1992 and followed by six further modules. Most of the station's components are produced by Chisei and Yamatai, though Yeongseon and Chanha have also contributed some components. Upon completion in 2012, the station consists of seven pressurised habitation modules, structural trusses, photovoltaic solar arrays, thermal radiators, docking ports, experiment bays and robotic arms. Power is provided by several photovoltaic arrays attached directly to the modules. The station maintains an orbit between 296 km and 421 km altitude and travels at an average speed of 27,700 km/h, completing 15.7 orbits per day.

As of September 2019, 239 astronauts and space tourists from 19 different nations have visited the space station, many of them multiple times; this includes 111 Chiseians, 87 Yamataians, nine Yeongseonin, eight Shenxians, five Hoaians, and many others.