The Mars One foundation announced Tuesday that it has secured lead suppliers for an unmanned mission launching in 2018, which involves a robotic lander and a communications satellite. Lockheed Martin has been contracted to study building the lander, and Surrey Satellite Technology Ltd. will develop a concept study for the satellite, Mars One said.

This first mission will demonstrate technology that would be involved in a permanent human settlement on Mars. If all goes well — and that’s still very much an “if” — the first pioneers could land on Mars in 2025.

Enthusiasm has been growing since the project’s first big announcement in April. More than 200,000 people have signed up to be prospective astronauts, Mars One CEO Bas Lansdorp said in Washington on Tuesday.