Twenty-eleven will be the "year of launchers", says European Space Agency director-general Jean-Jacques Dordain.Europe expects to have three different rockets operating from its French Guiana spaceport in the coming months.
The workhorse Ariane 5 will be joined by the Russian Soyuz vehicle and a new small launcher called Vega.
At his annual Paris press conference to preview the year ahead, Mr Dordain said this represented a major change in the way Esa conducted its space activities.
And he told the BBC everyone might be surprised at how complex an undertaking this would be.
"For 30 years we have exploited one launcher, the best launcher in the world, Ariane - but it was one launcher," he explained.
"From this year, we will exploit three launchers in parallel - Ariane, Soyuz and Vega. It will introduce some constraints because the traffic will be much heavier from [the spaceport], and I'm not so sure we've yet totally understood the constraints which are linked to the exploitation of three launchers instead of one."
A completely new launch facility has been constructed for Soyuz in French Guiana, allowing the Russian-built vehicle to shift some of its operations to the European spaceport from its traditional home of the Baikonur Cosmodrome in Kazakhstan.
The launch complex will have its qualification review in April with the expectation that the first Soyuz lift-off occur sometime between 15 August and 15 September. The rocket will carry into orbit two spacecraft for Europe's Galileo satellite-navigation system.
Both the pad and the rocket system itself will have to get through a review process before being cleared to launch. Only when that process is complete will a maiden flight date be set, but it should be in the second half of the year.