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Stargazers will get a rare triple planetary treat this weekend with Jupiter, Mercury and Mars appearing to nestle together in the predawn skies. About 45 minutes before dawn on Sunday those three planets will be so close that the average person's thumb can obscure all three from view.
They will be almost as close together on Saturday and Monday, but Sunday they will be within one degree of each other in the sky. Three planets haven't been that close since 1925, said Miami Space Transit Planetarium director Jack Horkheimer.
And it won't happen again until 2053, he said.
"Jupiter will be very bright and it will look like it has two bright lights next to it, and they won't twinkle because they're planets," said Horkheimer, host of the television show "Star Gazer. "This is the kind of an event that turns young children into Carl Sagans."
The planets are actually hundreds of millions of miles apart, but the way the planets orbit the sun make it appear they are neighbors in the east-southeastern skies. They'll be visible in most parts of the world in the Western Hemisphere, as far south as Buenos Aires and as far north as Juneau, Alaska, Horkheimer said.
The experts differ on just how to look at the planets. Horkheimer said naked-eye viewing is fine, but binoculars or a telescope are even better.
But if you are going to use a telescope, be careful because the planets are so close to where the sun will soon rise, if you linger you might gaze at the sun through the telescope and damage your eyesight, said Michelle Nichols, master educator at Chicago's Adler Planetarium.
Much more at link: http://news.yahoo.com/s/ap/20061209/ap_on_sc/three_planets_4&printer=1