The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
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There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
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A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
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Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
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Sound doesn't travel in space.
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The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
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Jupiter's moon Ganymede, is larger than the planet Mercury!
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