A base on the moon may precede a manned trip to the Red Planet according to the head of the ESA

Humans will not land on Mars for at least 15 years says ESA head

The head of the European Space Agency (ESA) has said that humans will not visit the surface of Mars for at least 15 years because the necessary technology has not been developed yet.

His claims cast into doubt earlier suggestions that such a journey could happen sooner.

"If there was enough money then we could possibly do it earlier, but there is not as much now as the Apollo programme had," ESA director-general Jan Woerner said.

Woerner believes a permanent human settlement on the Moon, where 3D printers could be used to turn moon rock into essential items needed for the two-year trip to Mars, would be a major step toward the red planet.

NASA hopes to send astronauts to Mars in the mid-2030s and businessman Elon Musk, head of electric car maker Tesla Motors, says he plans to put unmanned spacecraft on Mars from as early as 2018 and have humans there by 2030. 

A spacecraft sent to Mars would need rockets and fuel powerful enough to lift back off for the return trip. Its crew would need protection from unprecedented physical and mental challenges as well as deep-space radiation.

Woerner would like to see a cluster of research laboratories on the moon, at what he calls a ‘Moon village’, to replace the International Space Station when its lifetime ends and to test technologies needed to make the trip to Mars.

That could be funded and operated by a collection of private and public bodies from around the world, he said in an interview at the ESA's Operations Centre.

"There are various companies and public agencies asking to join the club now, so they want to do different things - resource mining, in situ research, tourism and that kind of stuff. There is a big community interested," he said.

"The Moon village is a pit stop on the way to Mars," Woerner said, adding that new 3D printing technology could be used to build material and structures out of rocks and dust, doing away with the cost of transporting everything needed for a mission.

"To test how to use lunar material to build some structures, not only houses, but also for a telescope or whatever, will teach us also how to do it on Mars," he said.

In March, the ESA, working with Russia, sent a spacecraft on a seven-month journey as part of the agency's ExoMars mission, which will use an atmospheric probe to sniff out signs of life on Mars and deploy a lander to test technologies needed for a rover scheduled to follow in 2020.

Woerner said Europe is looking at ways to lower the cost of launches but did not plan to copy Elon Musk's SpaceX, which is trying to develop relatively cheap, reusable launch vehicles.

"We should not copy. To follow and copy does not bring you into the lead. We are looking for totally different approaches," Woerner said, adding the ESA was examining all manner of new technologies, including air-breathing engines that do not need to tap into oxygen from a spacecraft's tank.

China is currently fast-tracking the development of a Martian rover to be launched in 2020, with hopes of it reaching the Red Planet by 2021. 

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