Valles Marineris is a system of canyons that runs along the Martian surface east of the Tharsis region. At more than 4,000 km long, 200 km wide and up to 7 km deep, Valles Marineris is the largest canyon in the Solar System. From Wikipedia
This month, stargazers can enjoy optimal views of Jupiter, Mars, and Uranus, along with the Leonid meteor shower and a fading comet.
