Mars
is the fourth planet from the Sun.
Mars is also a dynamic planet with seasons, polar ice caps,
canyons, extinct volcanoes, and evidence that it was even
more active in the past.
Mars
is a dusty, cold, desert world with a very thin atmosphere.
There is strong evidence Mars was—billions of years ago—wetter
and warmer, with a thicker atmosphere.
Mars
is one of the most explored bodies in our solar system,
and it's the only planet where we've sent rovers to roam
the alien landscape. Two NASA rovers and one lander are
currently exploring the surface of Mars (and a Chinese lander
is set to land later this year). An international fleet
of eight orbiters are studying the Red Planet from above.
These
robotic explorers have found lots of evidence that Mars
was much wetter and warmer, with a thicker atmosphere, billions
of years ago.
Mars
is sometimes called the Red Planet. It's red because of
rusty iron in the ground.
10
Things to know
1 Small planet
2 Fourth Rock
3 Longer days
4 Rugged terrain
5 Bring a spacesuit
6 Two moons
7 Ringless
8 Many missions
9 Tough place for life
10 Rusty planet
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