1. Overview of the Tiangong Space Station

The Tiangong Space Station (meaning 'Heavenly Palace') is China's permanently crewed orbital laboratory. Completed between 2021 and 2022, it maintains a continuous crew of three taikonauts conducting cutting-edge microgravity physics, space life sciences, and advanced materials engineering.

2. The T-Shaped Modular Architecture

• Tianhe Core Module: Central management, crew quarters, life support systems, and docking hubs.
• Wentian Experiment Module: Life science research, dedicated airlock for EVAs, and robotic manipulator arm.
• Mengtian Experiment Module: Microgravity physics, high-precision atomic clocks, and payload deployment airlock.

3. Comparison with the International Space Station (ISS)

While Tiangong weighs around 100 tons (about one-fourth of the ISS), it incorporates modern 2020s avionics, high-efficiency gallium arsenide solar wings, and ion thrusters for orbital maintenance.

4. Orbital Characteristics & Sightings

Tiangong orbits at an altitude of 380-400 km with an orbital inclination of 41.5 degrees, making it visible to millions of stargazers across mid-to-low latitude regions worldwide.