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USPS Star Calendar for 10 to 16 April 3 April 2011

Posted by amedalen in April 2011.
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10 Apr    The moon is directly above Orion and below the Gemini Twins at sunset. Procyon is 1.5 fist-widths to the lower left.

11 Apr    The Gemini Twins are 1 fist-width to the moon’s right. First-quarter moon at 1205 UT

12 Apr    The moon is high in the south at dusk. Magnitude 1.3 Regulus, the brightest star in Leo, the Lion, is 1.5 fist-widths to the moon’s left or upper left, and Procyon is 2 fist-widths to the lower right. Fifty years ago today Soviet cosmonaut Yuri Gagarin made the first manned Earth orbit.

13 Apr    Regulus is 3 finger-widths to the waxing gibbous moon’s upper left tonight. More than 66 percent of the moon’s surface is illuminated.

14 Apr    The waxing gibbous moon is high in the southeast at evening twilight. Regulus is 1.5 fist-widths to the upper right and magnitude 0.4 Saturn is 3 fist-widths to the lower left. Use binoculars to see magnitude 2.9 Porrima 1 finger-width to Saturn’s upper right.

15 Apr    The equation of time is zero. Apparent solar time (sundial time) and mean solar time are the same.

16 Apr    As the sky darkens, magnitude 0.4 Saturn becomes visible 4 finger-widths to the moon’s upper left. Magnitude 1.2 Spica appears 1 fist-width to the moon’s lower left. Magnitude 0.2 Arcturus is 3.5 fist-widths to the left, and the Big Dipper is nearly upside down far to the upper left.

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USPS Star Calendar for 11 to 17 April 4 April 2010

Posted by amedalen in April 2010.
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11 Apr
The moon rises 1½ hours before the sun and is followed by Jupiter a half-hour later. Both will be visible as the sky begins to brighten. Use binoculars. Apollo 13 launched this day in 1970.

12 Apr
On this day in 1961, Russian cosmonaut Yuri Gagarin became the first human in space. Twenty years later to the day in 1981, Columbia (STS-1), the first U.S. space shuttle, was launched.

14 Apr
New moon at 1229 UT.

15 Apr
The thin waxing crescent moon joins Venus and Mercury low in the south tonight. Magnitude 1.5 Mercury is less than 1 finger-width below the moon, while Venus is 3 finger-widths to the upper left.

16 Apr
The moon is between Venus and the Pleiades tonight. Measure 4 finger-widths down to Venus and 1 finger-width up to the Pleiades. Meanwhile, to the lower right, Mercury sinks closer to the horizon.

17 Apr
Tonight, look for Aldebaran 3 finger-widths to the moon’s lower left. Orion is even farther left, and the Pleiades Cluster is 1 fist-width to the lower right.