At just 0.010AU from Earth, 4179 Toutatis became the closest asteroid to Earth in the last century.
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A large explosion above the Pacific Ocean turned out to be a meteorite.
Astronomers announced the discovery of an Earth-like planet named Proxima b.
Asteroid 2014 RC passed safely by Earth at a distance of 24,800 miles away.
The US spacecraft, Voyager, took the first-ever photograph of the moon and Earth together from space.
The first-ever photograph was taken of the Earth from the surface of the Moon.
