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USPS Star Calendar for 25 to 31 July 18 July 2010

Posted by amedalen in July 2010.
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25 Jul
Full Thunder Moon at 0136 UT tomorrow morning, or 2136 EDT tonight

27 Jul
Tonight, magnitude 0.1 Mercury passes within 0.29 degree of magnitude 1.3 Regulus, making this the year’s closest planet-first magnitude star appulse. They set more than an hour after sunset, so you will have a good opportunity to see this event.

28 Jul
Low in the west at sunset, magnitude 1.5 Mars is 1 finger-width below magnitude 1.1 Saturn, and magnitude -4.2 Venus is 4 finger-widths to the lower right. The moon is at apogee, 63.65 Earth-radii away.

30 Jul
Jupiter rises less than a half-hour after the moon late this evening.

31 Jul
High in the south before dawn, Jupiter is 3 finger-widths below the moon. Tonight, Mars and Saturn pass within 1 finger-width, with magnitude 1.5 Mars to the lower left of magnitude 1.1 Saturn.

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USPS Star Calendar for 18 to 24 July 11 July 2010

Posted by amedalen in July 2010.
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18 Jul
First-quarter moon at 1010 UT

20 Jul
The moon is in the head of the Scorpion, Scorpius.

21 Jul
Magnitude 1.1 Antares is 3 finger-widths to the moon’s right this evening.

23 Jul
The moon is just above the handle of the Teapot constellation, Sagittarius.

USPS Star Calendar for 11 to 17 July 4 July 2010

Posted by amedalen in July 2010.
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11 Jul
Regulus
sinks rapidly toward the evening horizon while Venus appears stationary. New moon at 1940 UT

13 Jul
As the sky begins to darken, look for Regulus 4 finger-widths to the upper left of the thin waxing crescent moon. Brilliant Venus is to the upper left of Regulus. The moon is at perigee, 56.62 Earth-radii away.

14 Jul
Regulus is 1 fist-width to the right of the moon, and Venus is to the moon’s upper right.

15 Jul
Venus
is 1½ fist-widths to the moon’s right low in the west at sunset. Mars is 3 finger-widths to the moon’s upper right, and Saturn is 1 fist-width above.

16 Jul
During the next 3 weeks, watch Mars and Saturn grow closer as Venus creeps in from the lower right.

17 Jul
Tonight, magnitude 1.2 Spica is 1 finger-width above the moon, and Scorpius is far to its left.

USPS Star Calendar for 4 to 10 July 27 June 2010

Posted by amedalen in July 2010.
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4 Jul
For the next week or so, watch Venus and Regulus grow closer each evening. Last-quarter moon at 1435 UT

6 Jul
Earth is at aphelion, its farthest distance from the sun, about 1.0167 astronomical units away. This is about 3.1 million miles more than the distance at perihelion, Earth’s closest approach to the sun, on 3 Jan.

8 Jul
As the sky darkens, Venus and Regulus stand side by side, separated by 1 finger-width low in the west.

9 Jul
Venus
passes to the upper right of Regulus, separated by 1 degree.

10 Jul
Venus
is now above or to the upper left of Regulus.

USPS Star Calendar for 27 June to 3 July 20 June 2010

Posted by amedalen in July 2010, June 2010.
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28 Jun
The moon is low in the southwest with Sagittarius about to set to its lower right an hour before sunrise. Altair is 2½ fist-widths to the upper right. Four fist-widths to the left is magnitude 1.3 Fomalhaut.

30 Jun
An hour before sunrise, the moon hangs high in the south, midway between Altair, 3 fist-widths to the upper right, and Fomalhaut, not quite as far to the lower left. Jupiter is far to the upper left, about 4 fist-widths away.

1 Jul
Saturn
, Mars, Regulus and Venus form a line from upper left to lower right just above the western horizon at sunset. To the upper right, the Big Dipper sits with its handle above the bowl. The moon is at apogee, 63.51 Earth-radii away.

2 Jul
The midpoint of the year occurs at 1200 UT.

3 Jul
Look high in the southeast just before sunrise to find Jupiter 3 finger-widths to the moon’s lower left.