Asteroid 2002 AJ129 is relatively massive, and it moves fast. It'll be closest to Earth on February 4, 2018, at about 10 times the moon's distance. This post tells you how to watch online.
Check out this sweeping vista on the planet Mars, taken by the Curiosity rover from a mountainside ridge. It provides a look back at key sites the rover has visited since its 2012 landing.