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Posted on December 17, 2012 | 4:40 p.m.

Westmont Telescope Viewing Goes Lunar, with Chance of Jupiter

Source: Scott Craig for Westmont College

Weather permitting, Westmont College’s powerful Keck Telescope hopes to zoom in on the craters of the moon during a free, public viewing of the stars beginning at 6:30 p.m. Friday, Dec. 21.

The best viewing generally occurs later in the evening. In case of inclement or overcast weather, please call the Telescope Viewing Hotline at 805.565.6272 and check the Westmont website to see if the viewing has been canceled.

The moon, which will be nine days old, will be high in Pisces that evening.

“We should be able to see some detail without straining our neck,” said Thomas Whittemore, Westmont physics instructor. “The crater triplet of Ptolomaeus, Alphonsus and Arzachel may show some interesting details in their shadows earlier in the evening. This gorgeous triplet will lie just beyond the Moon’s terminator, the light-shadow boundary, as viewing begins.”

Whittemore said the gas giant Jupiter may also be good to view.

“One moon of Jupiter, Io, will be alone on one side of Jupiter, and the other three Galilean moons, Europa, Ganymede and Callisto, will be lined up on the other side of Jupiter,” he said.

The Double Cluster in Perseus, also known as NGC 884 and NGC 869, may also be featured at the viewing.

“They’re a pair of open clusters about 7,600 and 6,800 light-years away — so they are close to one another in space,” Whittemore said.

The clusters’ ages, based on their individual stars are relatively young. NGC 869 is 5.6 million years old and NGC 884 is 3.2 million years old. In comparison, the Pleiades have an estimated age ranging from 75 to 150 million years.

“There are more than 300 blue-white super giant stars in each of the clusters,” he said. “They’ll be a real Christmas treat in Westmont’s 8-inch refractor.”

The Keck Telescope is housed in the observatory between Russell Carr Field and the track and field/soccer complex. Free parking is available near the baseball field.

— Scott Craig is the media relations manager for Westmont College.

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