Rosetta will be the first spacecraft to orbit a comet and to place a lander on the surface . NASA says the mission objective is to help understand the evolution of the solar system . After observing the comet a lander will be deployed to the surface . Some believe Earth may have received its name from comets .
Rosetta will be the first spacecraft to orbit a comet and to place a lander on the surface . ESA says the mission objective is to help understand the evolution of the solar system . After mapping the comet a lander will be deployed to the surface . Some believe Earth may have received its water from comets .