Planet Mars, explained Mars has not only the highest highs, but also some of the solar system’s lowest lows. Southeast of Olympus Mons lies Valles Marineris, the red planet’s iconic canyon system.

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

Planet Earth, explained Like Venus and Mars, Earth has mountains, valleys, and volcanoes. But unlike its rocky siblings, almost 70 percent of Earth's surface is covered in oceans of liquid water ...

This depends on the planet’s climate, time periods, rotational periods, and more. One of the best choices is Mars. Mars is a terrestrial planet with a very thin atmosphere, unlike Earth ...