Jupiter's moon Ganymede, is larger than the planet Mercury!
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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The earth rotates more slowly on its axis in March than in September.
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41% of the moon is not visible from earth at any time.
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Only 55% of Americans know that the sun is a star.
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Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
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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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