In the last 7 years, humanity has discovered 43 potentially habitable planets.
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The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
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There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
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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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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's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
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