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The Upcoming Transit of Venus
This June, Venus is going to make a rare transit across the disk of the sun as observed from Earth. Transits of Venus are rare. They come in pairs eight years apart, but each pair is separated by 105.5...
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NASA’s Manned Grand Tour of the Inner Planets
The inner planets – Mercury, Venus, Earth, and Mars. Credit: NASA In the 1960s, planetary flybys were all the rage at NASA. In 1966, graduate student Gary Flandro discovered that the planets were about...
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The 2,500 Year-Old Search for Another Earth Continues
A 2011 graphic of the stars Kepler has identified as hosting planets; the potential planets are the dark spots, transiting their stars. For scale, the Sun is shown below the top row of stars towards...
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