It was once thought that there were canals on this (*) planet, but they turned out to be optical illusions.
The Hellas Plantia impact basin can be found on this astronomical body, which contains the largest canyon in the solar system, Valley Marineris. It was once thought that there were canals on this (*) planet, but they turned out to be optical illusions. Its iron oxide contributes to its color. Phobos and Deimos are moons of, for 10 points, what home of Olympus Mons called the "red planet"?
The Hellas Plantia impact basin can be found on this astronomical body, which contains the largest canyon in the solar system, Valley Marineris.
Mars