Tuesday,  December 11, 2012 • Vol. 13--No. 146 • 21 of 41 •  Other Editions

Venus and Mercury point out crescent moon in glow of dawn December 12

• The chart at the top of this post shows the sky scene for about 30 to 45 minutes before sunrise (Wednesday,

December 12) at mid-northern North American latitudes. With binoculars, you might - or might not - see a ghost of a

moon by the horizon and in the glare of morning twilight. Draw an imaginary line from the brilliant planet Venus through the fainter planet Mercury to locate the pale, whisker-thin lunar crescent.
• The moon on Wednesday morning will be an extremely old waning crescent moon. As seen from North America, about 1% of the moon's daylight side and 99% of its nighttime side will be facing us in the glow of twilight.
• The moon will turn new in North America on Thursday, December 13, at 2:42 a.m. CST (8:42 Universal Time). So, for us in North America, tomorrow's exceedingly-thin waning crescent moon will be less than one day before new moon.
• It'll be easier to catch the moon tomorrow (Wednesday, December 12) from other places worldwide - like in eastern Asia, Indonesia, Australia and New Zealand. In this part of the world, the lunar crescent will be larger and brighter, will rise sooner before sunrise and will be closer to the planet Mercury. Moreover, Mercury and the waning crescent moon will take stage within a single binocular field of view.
• You've probably heard people alluding to a young evening crescent moon as the new moon in the old moon's arms. For another twist on this popular saying, we can refer to the thin morning crescent as the old moon in the new moon's arms. Look for the morning crescent and Mercury, the solar system's innermost planet, beneath the dazzling planet Venus.

© 2012 Groton Daily Independent • To send correspondence, click here.