Venus and Jupiter, the two brightest planets in the sky this month, will be joined by tiny Mercury for a rare celestial show this weekend.
Typically, Venus, the second-closest planet to the sun, and Jupiter, which orbits beyond Mars, are tens of millions of miles apart. But they have been cycling together while moving ever closer to each other this month, joined by the innermost planet Mercury.
The celestial show peaks on Sunday when the trio will appear as a bright triangle of light in the western sky beginning about 30 minutes after sunset.
Triple conjunctions are relatively rare, according to NASA. The last one was in May 2011 and the next one will not occur until October 2015.
"This triple is especially good because it involves the three brightest planets in May's night sky," the U.S. space agency said on its website.
The formation should be visible even in places with bright city lights, though a clear view of the western horizon is a must.
http://www.reuters.com/article/2013/05/ ... VH20130524
Discussions about the sky, the moon, the stars, etc.
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