Where are all the active spacecraft in our Solar System?

Since Sputnik 1 was launched in 1957, humans have sent thousands of spacecraft into the cosmos. There are currently around 50 active craft in our Solar System (not including miniaturised, amateur or commercial craft). Here’s where they are and what research they are doing.

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What if we find alien life?

Professor Stephen Hawking has launched a new, highly funded search for extraterrestrial intelligence, but what will happen if we actually do end up making first contact?