Invader.

Even if you have never heard of Invader, I'm sure you've seen his street art at some point in your life. Inspired by the 1978 video game, Space Invaders, the street artist began to paste tiled versions of the pixel invader characters across the city. His characters are everywhere, from France to New York to Japan. Most notably, his mosaics have pasted on each letter of the the Hollywood (however, the Invader did get in to a little trouble for it). One of his invader characters even made it to space…kinda. More like the invader went really, really, really high up. High enough in the sky to look like space (see below.)