The European space mission Rosetta, during its 10 years journey to the comet 67P/Churyumov-Gerasimenko, on 10 July 2010 made an intermediate stop flying close to the asteroid 21 Lutetia and observed it from varying viewing angles, otherwise inaccessible from Earth. Less than four months later, on 4 November 2010, the NASA EPOXI mission offered another unexpected opportunity approaching the small hyperactive Jupiter-family comet 103P/Hartley 2, a few days after its perihelion passage. Those encounters provided an exceptional possibility for the advance in understanding our Solar System...
The European space mission Rosetta, during its 10 years journey to the comet 67P/Churyumov-Gerasimenko, on 10 July 2010 made an intermediate stop flyi...