1 May High in the west at dusk, Procyon is 1 fist-width to the waxing crescent moon’s lower left. Pollux is 1 fist-width to the upper right. Dimmer magnitude 1.93 Castor is 2 finger-widths to the right of Pollux.
3 May Magnitude 1.4 Regulus is only 2 finger-widths to the left of the first-quarter moon at dusk.
7 May The waxing gibbous moon is 1 finger-width to the lower left of magnitude -1.4 Jupiter. Magnitude 0.98 Spica is 4 finger-widths below the moon.
8 May Spica is 3 finger-widths to the moon’s upper right tonight. The bright star 3 fist-widths to the moon’s upper left is magnitude 1.6 Arcturus.
12 May At midnight, Antares, the heart of the Scorpion, is 1 fist-width to the moon’s right, and magnitude 0.2 Saturn is 4 finger-widths to the lower left, just above the horizon. The moon is at apogee, 63.69 Earth-radii (406,000 kilometers) away.
13 May Saturn is 3 finger-widths to the moon’s lower left before first light. The equation of time reaches a maximum of 3.65 minutes.
17 May Rising an hour before the sun, Mercury reaches its greatest western elongation, 25.8 degrees from the sun.
19 May The last-quarter moon is low in the south before first light.
22 May Look low in the east before dawn to see Venus, 1½ finger-widths to the moon’s upper left.
23 May The moon lies between Venus, a little more than 1 fist-width to the upper right, and Mercury, less than 4 finger-widths to the lower left, near the eastern horizon before dawn.
26 May The moon is at perigee, 56.01 Earth-radii (357,000 kilometers) away. Perigee occurs only 5.6 hours after the new moon, so check your tide tables for higher than normal tides.
28 May Low in the west at dusk, the thin waxing crescent moon is midway between Procyon to the lower left and Pollux to the upper right.
30 May Regulus is less than 4 finger-widths to the moon’s upper left this evening.
31 May The moon passes to Regulus’ upper right tonight.
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