Welcome to ESA's website for the Rosetta Science Ground Segment 

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The target audience for this site is scientists and engineers involved in the Rosetta mission. ESA pages for the general public interested in the Rosetta mission can be found in the main Rosetta portal, ESA mission page, and the Science page.

ESA's historic Rosetta mission concluded as planned, on 30 September 2016, with a controlled impact onto the comet it had been investigating for more than two years. The mission was launched on 2 March 2004, on a 10-year journey towards comet 67P/Churyumov-Gerasimenko. En route, it passed by two asteroids, 2867 Steins (in 2008) and 21 Lutetia (in 2010), before entering deep-space hibernation mode in June 2011. On 20 January 2014, it 'woke up' and prepared for arrival at the comet in August that year. On 12 November, the mission deployed its Philae probe to the comet, the first time in history that such an extraordinary feat was achieved. During the main phase of the mission, Rosetta accompanied the comet through perihelion (13 August 2015) until the end of the mission (30 September 2016).