The Tianzhou-2, or Heavenly Vessel in Chinese, blasted off via a Long March-7 Y3 rocket from the Wenchang Space Launch Centre on the southern island of Hainan in the South China Sea, the China Manned Space Engineering Office said on Saturday, Aljazeera reported.
Tianzhou-2 is the second of 11 missions needed to complete China’s first self-developed space station around 2022, and follows the launch of the key module Tianhe in late April.
The Tianhe, or Heavenly Harmony, is the third and largest orbital station launched by China’s increasingly ambitious space programme.
The three-module space station will rival the only other station in service, the International Space Station (ISS), which is backed by countries including the United States, Russia and Japan.
China was barred from participating in the ISS by the US. Washington is wary of the secrecy surrounding the Chinese program and its military connections.
Tianzhou-2 will autonomously dock with Tianhe, which will provide supplies for future astronauts as well as a propellant to maintain its orbital altitude.
The rocket’s launch was postponed this month due to technical reasons, state media said.
The first cargo spacecraft Tianzhou-1 was sent to refuel a space lab – Tiangong-2 – three times in 2017, as a test of the technologies needed to support the construction of the space station.
Both Tiangong-2 and an earlier space lab Tiangong-1 have been deorbited in recent years.
Next year, China will launch the two other core modules – Wentian and Mengtian – using the Long March 5B, its biggest and most powerful space transport vehicle.
RHM/PR