Earth is the only planet in our solar system that's not named after a god or goddess.
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An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
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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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Pluto is smaller than Russia.
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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.
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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