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The best spot for space astronomy missions is the night-side libration point of the Sun-Earth system L2.
The basic requirements and designs for libration-point missions like Gaia and LISA Pathfinder will be presented, together with insights into the manoeuvre history of Herschel/Planck.
The discussion will include what options exist if the launcher does not perform as expected. Concepts of future mission designs are discussed as well as how astronomy missions could look post-Cosmic Vision and how we can prepare for the coming challenges.