At 17.4 billion km away from Earth, Voyager 1 is about to leave our solar system and enter interstellar space, the furthest a man made object has ever travelled. Incredibly, some 33 years after launch it is still sending information back to us.
full story here
This plaque is on the side of the space craft, and describes who we are and where we live:
Both Voyager 1 and 2 also carry golden records; containing a collection of greetings, sounds and images, full content here