Mars had an oxygen-rich atmosphere around 4 billion years ago
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It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
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There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
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Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
A comet's tail always points away from the sun.
2
In the last 7 years, humanity has discovered 43 potentially habitable planets.
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