From Popular Mechanics

The solar system is big. It may stretch out up to a light year across, depending on the outer boundary of the Oort Cloud. But considering it's barely been 50 years since humanity has launched objects into space, it's amazing where we've been able to explore: all nine classical planets, comets, asteroids, and more. Five probes are on exit routes out of the solar system, two having entered interstellar space beyond the sun's stronger influences.

Pop Chart Lab created this poster, due to ship March 22 for $38, to celebrate that exploration, showing each and every probe that's prodded the worlds in the first three zones of our solar system. With Pluto and Ceres explored as of last year, there's just the Kuiper Belt and maybe planet nine up ahead.

It's amazing to see the details sussed out. For instance, the Earth system, Mars, and Venus have plenty of probes, and Jupiter and Saturn have a decent handful. On the other hand, Uranus and Neptune look a little lonely out there, and Mercury has only been visited a few times. It's also impressive to see the breadth of exploration of small objects, especially comets and asteroids.

The coming years may bring a Europa lander, a visit to a new Kuiper Belt Object via the New Horizons Pluto probe, chatter of a mission to one of the "ice giants" of Uranus or Neptune, and maybe a human landing on Mars. In the meantime, this is a great way to see how much we've accomplished since the late 1950s.

Source: Pop Chart Lab via Gizmodo