Negative Space is an ongoing series of photographic murals of inverted astronomical imagery sourced from the Hubble Space Telescope. Mungo Thomson works with the Hubble archive in an ongoing way, generating a negative image every time the Hubble generates a positive one. Through a simple command in Photoshop, blacks become whites, whites become blacks, and all other colours are transformed into their complement. These images are then made into site-specific photographic murals for empty walls and installed like wallpaper, indoors and out, temporary and permanent. The project also includes an artist book, an original font, and a screensaver. Several outdoor billboards have also been produced.