1. Mercury's very own satellite.
NASA's MESSENGER spacecraft, which recently celebrated its 10-year launch anniversary in August, has been in a steady orbit around Mercury since 2011 and has gathered 255,858 images since its launch. It was a risk sending the small satellite on the mission, but after a decade in space, the images captured have been invaluable to understanding our solar system's smallest planet.
2. Earth-sized solar flare.
3. Finding Venus.
4. The Martian rovers.
Moving farther from Earth, we have robotic photographers on the surface of Mars! In addition to the Curiosity Mars rover NASA has two other rovers on the planet as part of its Mars Exploration Rover Mission: the Spirit and Opportunity. The crater above, named Echus Chasma, was first captured by the ESA's Mars Express, and the image of the planet's horizon was taken by NASA's Hubble Space Telescope.