Summer Solstice: The Unequinox; a Planetary Inflection Point
Just when you think the sun will climb to ever-higher latitudes and throw the southern hemisphere into perpetual darkness, it reverses course.
May 10, 2012
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Jon Plotkin
Transit of Venus will be the Last One for More Than a Century
Venus will repeat its 2004 transit on June 5 and 6, 2012. Transits of Venus are rare. For those who miss the June 2012 event, the next one will be in 2117.
Apr 18, 2012
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Harvey Craft
Asteroid 2012 DA14 may be on a Collision Course with Earth
The Earth seems to be in a shooting gallery for asteroids. Last year it was YU55 that passed by closer than the moon. Now one may pass by dangerously close.
Mar 7, 2012
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Harvey Craft
The Seven Wonders of the Worlds
Our Solar System is filled with some incredible sights and - when not utterly devoid of air - sounds. The following are seven of its most amazing wonders.
Mar 6, 2012
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Walter McLaughlin
Vernal Equinox and Leap Years
The spring equinox occurs on March 20, but the day and night are equal on March 16. Due to leap years, the date is changing so that spring starts earlier.
Mar 4, 2012
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Jon Plotkin
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