10 Facts About Space
99.8% – the amount of the solar system’s total mass that is contained within the sun alone.
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88 days – the length of a year on Mercury, the fastest orbiting of all the planets.
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118 days – the length of time between one sunrise on Venus and the next.
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5,500°C – the average temperature of Earth’s core, as hot as the surface of the sun.
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14 miles – the height of the martian volcano Olympus Mons, the tallest mountain in the solar system, around 3 times taller than Mount Everest.
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5,268 km – the diameter of Jupiter’s largest moon, Ganymede, bigger even than the planet Mercury.
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270,000 km – the diameter of the outer rings of Saturn, the largest in the solar system.
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-224°C – the temperature to which Uranus can plunge, making it the coldest planet in our solar system even though Neptune is further from the sun.
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1,300 mph – the approximate speed that winds can reach on Neptune, the fastest in our solar system and faster than the speed of sound.
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200 million – the estimated number of objects in the asteroid belt with a diameter greater than 1 km.
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