Resolution is Everthing

Explanation: Even the best images of Pluto, made by the Hubble Space Telescope, are too crude to reveal geologic details, because they can only put few pixels across the planet. Compare a Hubble image of Pluto (left) to an artificially blurred image of Earth at the same pixilation, and you'll see how little we know!

Pluto

Image credit: JHUAPL.