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Jupiter

The largest and most massive planet, it has the fastest spin

THE GANGES DELTA, EARTH

Only Earth has liquid water on its surface. Closer to the Sun, Earth's water would boil; farther away, it would freeze.

THE GANGES DELTA, EARTH

Only Earth has liquid water on its surface. Closer to the Sun, Earth's water would boil; farther away, it would freeze.

Uranus

^Twice as far from the Sun than inner Saturn, it is tilted on its side crust. On the surface they are worlds of contrast. Craters scar Mercury's dry, gray landscape, and the thick, poisonous atmosphere enveloping Venus hides its volcanic terrain. Oceans of water cover more than 70 percent of Earth, and dry, cold Mars is home to the solar system's largest volcanoes.

surface of mars

The Martian surface has been shaped by tectonic activity and by flowing water. It is also scarred by tens of thousands of impact craters (left).

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