China has opened the doors on what it bills as the world's largest planetarium, a slick new Shanghai facility showcasing the nation's recent extra-terrestrial exploits while notably downplaying those of space pioneers like the United States.

Beijing has spent much of this year bombarding the public with news of the country's rising space prowess, part of a larger propaganda blitz highlighting Chinese achievements under the ruling Communists to mark the party's 100th anniversary.

In recent months, China has landed a spacecraft on Mars, set loose a rover to explore it, and sent the first astronauts to a Chinese space station.

Scale-model replicas of spaceships from these and other missions figure prominently at the new Shanghai Planetarium, along with paeons to China's rapid scientific advancement, and clips of President Xi Jinping addressing the nation's taikonauts.

"This year we had several astronauts go to space, which is a source of pride for China," said a woman surnamed Zhou, who brought her young daughter.

The European Space Agency will on Friday launch the world's first commercial fully re-programmable satellite, paving the way for a new era of more flexible communications.

Unlike conventional models that are designed and "hard-wired" on Earth and cannot be repurposed once in orbit, the Eutelsat Quantum is based on so-called software-defined technology that allows users to tailor the communications to their needs—almost in real-time.

"When a satellite is launched, demand and markets can change over time," Elodie Viau, the agency's telecommunications and applications director, told AFP recently.

"A satellite that is not 'fixed' and can adapt to customers gives us better prospects."

A successful launch would pave the way for mass production of the satellites, which have so far been one-offs.

The Quantum will be part of the payload for an Ariane 5 rocket due to launch from the Guiana Space Centre in Latin America between 21:00 and 22:30 GMT on Friday.

In addition to the Quantum, to be operated by Paris-based Eutelsat, the rocket will also deploy a conventional satellite for Brazil's Embratel.

Because it can be reprogrammed while orbiting in a fixed position 35,000 kilometres (22,000 miles) above the Earth, the Quantum can respond to changing demands for data transmission and secure communications during its 15-year lifetime, ESA said.