More than 20 million meteoroids enter Earth's atmosphere every day.
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The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
Lightning strikes about 6,000 times per minute on this planet!
158
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
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