The atmosphere on Mars is almost entirely made up of carbon dioxide.
Mars has the tallest mountain known in our solar system, known as Olympus Mons. The mountain rises a whopping 16.8 miles (or 27 kilometers).
Dust storms sometimes cover the planet of Mars for months at a time. The storms, powered by solar heating, can envelop the entire planet in just days.
The planet Venus is named after the Roman goddess of love. It is the brightest planet in the night sky and the only planet to be named after a female.
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The drawf planet Pluto was named by the suggestion of an 11 year old, Venetia Burney from Oxford England. Her suggestion was voted on unanimously by the observatory that discovered the dwarf planet.
The day Saturday is named after the planet Saturn, which in turn was named after the Roman god of agriculture, Saturn.
Ice caps, glaciers and permanent snow store around 65% of all the fresh water on our planet.
The planet Saturn has 62 moons. One of it's moons named Titan is the only one in our solar system known to have an atmosphere.
The densest planet in our solar system is our own Earth. The least dense is Saturn. If all the planets were placed in a massive ocean, only Saturn would float.
The Burj Khalifa tower in Dubai is the tallest structure on our planet, measuring 2716 feet (828 meters). Alain Robert (a.k.a "The Spider Man") climbed the tower on the outside in six hours.
Around 60 tons of cosmic dust falls down to Earth from outer space every day. Every breathing organism inhales some of this ancient dust, which long ago may have formed a star or a planet.
Venus is the hottest planet in our solar system. The surface temperature on Venus is a burning 461.85 °C (863.33 °F). On Pluto it is so cold that liquid nitrogen turns to solid! Pluto's estimated surface temperature is around -228°C (-378°F).