A sampling of some of the best images from various missions and telescopic observations. All images are public domain unless otherwise noted.
Planets
Jupiter (Voyager 1)
Mars (Curiosity)
Mars (Mars Express)
Mars (Mars Global Surveyor)
Mars (Mars Reconnaissance Orbiter)
Mars (Opportunity)
Mars (Pathfinder)
Mars (Spirit)
Mars (Viking)
Mercury (MESSENGER)
Neptune (Voyager)
Saturn (Cassini)
Uranus (Voyager)
Venus (Venus Express)
Dwarf Planets
Pluto (Hubble Space Telescope)
Moons
Enceladus (Cassini)
Europa
Helene (Cassini)
Iapetus (Cassini)
Io (Galileo)
Mimas (Cassini)
Moon (Chandrayaan-1)
Moon (Lunar Reconnaissance Orbiter)
Phobos (Mars Express)
Prometheus (Cassini)
Tethys (Cassini)
Titan (Cassini/Huygens)
Asteroids
Eros (NEAR-Shoemaker)
Lutetia (Rosetta)
Comets
Exoplanets
Fomahault b (Hubble Space Telescope)
HD 189773b (Hubble Space Telescope)
HR 8799 (Keck Observatory)
Kepler 11 System (Kepler)
Kepler Candidates – 02/2011 (Kepler)