Mars

Mars is the fourth planet and furthest terrestrial planet from the Sun. It lies very close to the habitable zone, and it may be a good home for humans one day. It is slightly larger than 0.5 Earths.

Is There Water on Mars?
A: Yes. But Mars has very little water, only the ice caps on Mars, have water. But the young-aged Mars likely had water and was warmer than the icy cold red planet we know of today.

Olympus Mons
Olympus Mons is the largest volcano in the Solar System, three times higher than Mount Everest, Earth's highest mountain. It is 24 miles tall, so tall it sticks above Mars' atmosphere. Also, Mars' atmosphere is very thin, but talk about that later. Olympus Mons has a crater 50 miles wide. Olympus Mons latest eruption was 25 million years ago. Once, Olympus Mons non-stopped erupting for 2 billion years once.

Canyons
Mars has several canyons; the largest canyon is Mariner Valley, which is ten times larger than the Grand Canyon back on Earth.

Craters
Since Mars has a thin atmosphere, it allows a lot of dangerous rays from the Sun to reach the surface. Meteors don't often burn up, they leave craters. There are almost 1,100 craters known on Mars. The biggest crater is Hellas Planitia, is larger than even the dwarf planet Ceres, is 2,300 km in diameter. It is 5 miles deep, close to the depth of Earth's Ocean.

Dust Storms
Dust Storms (Dust Devils) often occur on Mars. Some presently may blanket the planet for months.

Spying Mars
Mars appears as a red-pinkish star in the night sky. Mars is the third-brightest planet after Venus and Jupiter. Mercury and Saturn can be seen as bonus.