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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Mars had an oxygen-rich atmosphere around 4 billion years ago
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A comet's tail always points away from the sun.
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One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
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Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
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The light hitting the earth right now is 30 thousand years old.
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