Artist's impression of the Rosetta orbiter at comet 67P/Churyumov-Gerasimenko. The image is not to scale. The Rosetta spacecraft measures 105 feet (32 meters) across including the solar arrays, while the comet nucleus is thought to be about 2.5 miles (4 kilometers) wide.

Rosetta is a mission of the European Space Agency, Paris, with contributions from its member states and NASA. Rosetta's Philae lander is provided by a consortium led by the German Aerospace Center, the Max Planck Institute for Solar System Research, the French National Space Agency and the Italian Space Agency. NASA's Jet Propulsion Laboratory, Pasadena, Calif., manages the U.S. contribution to the Rosetta mission for NASA's Science Mission Directorate in Washington.

More information about Rosetta is available online at www.esa.int/rosetta and http://rosetta.jpl.nasa.gov.