Ceres, photographed by the Hubble Space Telescope, 21st January 2009.
Ceres was originally considered a new planet, then classified as an asteroid (it resides in the asteroid belt between Mars and Jupiter), and has recently been recategorized as a dwarf planet.
This image is a mosaic of 4 Hubble instruments. The brightness is super jacked-up, which makes it all deliciously grainy. What the waffle pattern is about, exactly, I don’t know.
Image credit: NASA/ESA/STScl.