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OBSERVING<br />
Sky At A Glance<br />
3 Evening: Spica and brighter Saturn are left<br />
or lower left of the waxing gibbous Moon.<br />
4 Evening: The Moon is now below Saturn<br />
and Spica.<br />
5 Evening: The largest full Moon of 2012<br />
occurs at 11:35 p.m. EST.<br />
7 Dawn: Antares is lower left of the waning<br />
gibbous Moon.<br />
20 An annular solar eclipse is visible along<br />
a path from southern China through southern<br />
Japan to northern California and ending in<br />
northern Tex<strong>as</strong>. The partial ph<strong>as</strong>e is visible<br />
across much of Asia, the Pacifi c Ocean, and<br />
North America; see page 50.<br />
21 Dusk: Look for the extremely thin crescent<br />
Moon far below Venus very low in the westnorthwest<br />
15 to 30 minutes after sunset;<br />
see page 48.<br />
22 Dusk: The thin crescent Moon forms a line<br />
with Venus and Elnath low in the west-north<br />
west. Telescopes show that the Moon is also<br />
very close to 3rd-magnitude Zeta Tauri. Some<br />
parts of the U.S. can watch Zeta Tauri disappear<br />
behind the Moon’s dark limb or reappear from<br />
behind the bright limb. See page 52 for details.<br />
28 Evening: Mars shines above or upper left of<br />
the Moon.<br />
31 Evening: Spica is just above the waxing gibbous<br />
Moon, with brighter Saturn above Spica.<br />
Planet Visibility<br />
◀ SUNSET MIDNIGHT<br />
SUNRISE▶<br />
Mercury<br />
Hidden in the Sun's glow all month<br />
Venus<br />
Mars<br />
Jupiter<br />
Saturn<br />
W<br />
S W<br />
SE<br />
NW<br />
Moon Ph<strong>as</strong>es<br />
Hidden in the Sun's glow all month<br />
S<br />
PLANET VISIBILITY SHOWN FOR LATITUDE 40° NORTH AT MID-MONTH.<br />
SUN MON TUE WED THU FRI SAT<br />
1 2 3 4 5<br />
6 7 8 9 10 11 12<br />
13 14 15 16 17 18 19<br />
20 21 22 23 24 25 26<br />
27 28 29 30 31<br />
44 May 2012 sky & telescope<br />
W<br />
Using the Map<br />
Go out within an hour of a time<br />
listed to the right. Turn the map<br />
around so the yellow label for the<br />
direction you’re facing is at the<br />
bottom. That’s the horizon. Above<br />
it are the constellations in front of<br />
you. The center of the map is<br />
overhead. Ignore the parts<br />
of the map above horizons<br />
you’re not facing.<br />
EXACT FOR LATITUDE<br />
40º NORTH.<br />
Facing E<strong>as</strong>t<br />
AQUILA<br />
19 h<br />
SERPENS (CAUDA)<br />
SAGITTA<br />
Galaxy<br />
Double star<br />
Variable star<br />
Open cluster<br />
Diffuse nebula<br />
Globular cluster<br />
Planetary nebula<br />
M27<br />
VULPECULA<br />
70<br />
Facing NE<br />
Albireo<br />
<br />
IC4665<br />
<br />
<br />
<br />
<br />
Northern<br />
Cross<br />
<br />
OPHIUCHUS<br />
M10<br />
Facing SE<br />
M29<br />
<br />
<br />
CYGNUS<br />
M57<br />
Antares<br />
LYRA<br />
<br />
<br />
Deneb<br />
SCORPIUS<br />
M4<br />
M12<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
16 h<br />
<br />
<br />
<br />
Vega<br />
R<br />
HERCULES<br />
M39<br />
<br />
19 h<br />
<br />
<br />
<br />
<br />
LUPUS<br />
<br />
<br />
M92<br />
M13<br />
M5<br />
LIBRA<br />
<br />
<br />
<br />
CORONA<br />
BOREALIS<br />
<br />
<br />
<br />
DRACO<br />
<br />
SERPENS<br />
(CAPUT)<br />
<br />
<br />
<br />
CEPHEUS<br />
<br />
<br />
Moon<br />
May 5<br />
<br />
M52<br />
<br />
<br />
URSA<br />
MINOR<br />
BOÖTES<br />
Arcturus<br />
SIOPEIA<br />
North<br />
+60°<br />
Zenith<br />
VIRGO<br />
Spica<br />
CENTAURUS<br />
<br />
<br />
<br />
<br />
<br />
<br />
Saturn<br />
<br />
Mizar<br />
& Alcor<br />
Thuban<br />
<br />
<br />
Little<br />
Dipper<br />
<br />
M51<br />
<br />
M3<br />
<br />
<br />
0°<br />
–40°<br />
h<br />
CO<br />
BERE<br />
<br />
<br />
<br />
<br />
<br />
13<br />
Facing
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