Mercury is putting on a show for skywatchers in the evening sky after sunset. But how well do you know the planet Mercury? Here's some Mercury trivia to ponder while planet gazing.

Here's a look at our solar system, from the scorching surface of Venus to the home of the largest volcano.

Seven interesting facts about the dwarf planet Ceres, which NASA's Dawn spacecraft will begin orbiting on Friday (March 6).

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Discover interesting facts about Mars, its moons, its atmosphere, and the possibilities of life.

Read these 75 interesting and cool facts about Earth to learn more about our planet.