Marco Polo (spacecraft)
Marco Polo was a proposed space mission studied between 2007 and 2010. It was for a near Earth asteroid sample return, and was considered for the ESA Cosmic Vision programme. It was superseded by the MarcoPolo-R mission concept.
Other articles related to "marco":
... MarcoPolo-R - successor to MarcoPolo, submitted to the M3 call Asteroid Near-Earth object 107P/Wilson-Harrington European Space Agency Spaceports ...