By Jonathan Amos
Science correspondent, BBC News, Paris
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.
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http://www.bbc.co.uk/news/science-environment-12197109