Mark Twain was born around the time when Halley’s Comet passed the earth and he predicted that he would die during its next visit. He wrote “here are these two unaccountable freaks; they came in together, they must go out together” He died the day after Halley’s Comet returned.
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Every atom in your body was once part of a star.
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Pluto is smaller than the United States. If you were to walk around the equator of Pluto it would be the same distance as walking from London to Denver (well, give or take 56 miles).
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The Sun makes a full rotation once every 25 – 35 days.
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A light year is the distance that light can travel in one year. It works out at about 10 million million kilometres (6 million million miles)!
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Footprints left on the Moon won’t disappear as there is no wind.
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The highest mountain discovered is the Olympus Mons, which is located on Mars.
Olympus Mons compared to Mount Everest, its peak is 16 miles (25 km) high, making it nearly 3 times higher than Mount Everest. And not only is it tall, but it’s also 374,015 ft² (114,000 m²) wide – that’s an area the size of Arizona!
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All the planets in our solar system could fit inside Jupiter.
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The sun is 330,330 times larger than the Earth.

The longest possible eclipse of the sun is 7.31 minutes.
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Earth is the only planet not named after a gods.
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The Moon is moving approximately 3.8 cm away from our planet every year. It is estimated that it will continue to do so for around 50 billion years. By the time that happens, the Moon will be taking around 47 days to orbit the Earth instead of the current 27.3 days.
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When all the Hydrogen has been burned, the Sun will continue for about 130 million more years, burning Helium, during which time it will expand to the point that it will engulf Mercury and Venus and the Earth. At this stage it will have become a red giant.
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The Andromeda Galaxy is approaching the Milky Way at approximately 100 to 140 kilometres per second, but the distance so huge that it will take approximately 4.5 billion years for the Andromeda Galaxy and the Milky Way to collide and the result will be a giant elliptical galaxy.
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The red giant Betelgeuse has a diameter larger than that of the Earth's orbit around the sun. In fact, if it were in place of our sun it would absorb all but the outermost portions of the asteroid belt.
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The volume of the earth's moon is the same as the volume of the Pacific Ocean.
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The hottest planet in our solar system is Venus having temperature 864°F/ 462°C.
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The solar system is around 4,500 million years old. Scientist estimate that it will probably last another 5000 million years.
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No one knows who named Earth.
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Cheomseongdae Observatory, the world’s first astronomical lab, is located in South Korea. It was constructed in the mid-600s.
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750 light years from Earth. TrEs-2b is the darkest planet ever found. It is the size of Jupiter & even blacker than coal. It absorbs almost 100% of light that falls on it.
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If Earth stopped for 1 second and you weren't belt-buckled to the Earth, you would fall over and roll 800 mph due east... killing everyone.
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