Bandyopadhay, Amalendu2012-03-082012-03-082011-06-04http://hdl.handle.net/11007/913When MESSENGER, launched by NASA, began orbiting Mercury on March 18, it became the first spacecraft to do so.enOrbiting messengerNASARotation of MercuryMariner 10Entering mercury's orbitMercury's surfaceArticle