Name the spacecraft launched in 2004 by the European Space Agency to chase the comet 67P Churuyumov-Gerasimenko?
67P/Churyumov–Gerasimenko 67P/Churyumov–Gerasimenko 67P/Churyumov–Gerasimenko (abbreviated as 67P or 67P/C-G) is a Jupiter-family comet, originally from the Kuiper belt, with a current orbital period of 6.45 years, a rotation period of approximately 12.4 hours and a maximum velocity of . Churyumov–Gerasimenko is approximately at its longest and widest dimensions. It was first observed on photographic plates in 1969 by Soviet astronomers Klim Ivanovych Churyumov and Svetlana Ivanovna Gerasimenko, after whom it is named. It came to perihelion (closest approach to the Sun) on 13 August 2015. Churyumov–Gerasimenko was the destination of the European Space Agency's "Rosetta" mission, launched on 2 March 2004. "Rosetta"
67P/Churyumov–Gerasimenko be primordial. CAESAR is a proposed sample-return mission aimed at returning to 67P/Churyumov–Gerasimenko, capturing regolith from the surface, and returning it to Earth. This mission is competing in NASA's New Frontiers mission 4 selection process, and as of December 2017 is one of two finalists in the program. 67P/Churyumov–Gerasimenko 67P/Churyumov–Gerasimenko (abbreviated as 67P or 67P/C-G) is a Jupiter-family comet, originally from the Kuiper belt, with a current orbital period of 6.45 years, a rotation period of approximately 12.4 hours and a maximum velocity of . Churyumov–Gerasimenko is approximately at its longest and widest dimensions. It was first observed on photographic