There are currently various proposed space probes to focus on the exploration of the Solar System. For planned missions to the Moon see the dedicated list of missions to the Moon, with its section future missions. Launched probes are in the List of Solar System probes and the List of active Solar System probes.
The following missions were suspended or cancelled because of political, budgetary, or other reasons. The spacecraft were already assembled at the time of suspension/cancellation, so these missions can be resumed.