If two pieces of metal touch in space, they become permanently stuck together.
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The ashes of the man who discovered Pluto are currently en route to dwarf planet, scheduled to arrive on the 14th of July, 2015.
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Pluto is smaller than Russia.
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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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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Mars had an oxygen-rich atmosphere around 4 billion years ago
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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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