The Sky This Week: May 11 – May 15
A New Moon rises, Comet PANSTARRS makes an appearance, and Mercury crosses in front of the Sun.
Wednesday, May 11
Another comet in the growing throng of such objects discovered by the Pan-STARRS telescope in Hawaii makes its appearance it May’s morning sky. Comet PANSTARRS (C/2013 X1) currently glows between 7th and 8th magnitude in northeastern Aquarius. (This morning, it lies 2° northeast of 4th-magnitude Phi [f] Aquarii.) From most of the United States, you’ll need a clear, flat eastern horizon to spot the comet through a telescope just before dawn breaks.
Thursday, May 12
Brilliant Jupiter appears high in the south as darkness falls and remains on display until 3 a.m. local daylight time. The giant planet shines at magnitude –2.2 — brighter than any other point of light in the night sky — against the backdrop of southern Leo the Lion. Jupiter appears equally dazzling through a telescope, which reveals a wealth of atmospheric detail on a disk that spans 40″. Look carefully tonight and you should see a black dot crossing the cloud tops. This is the shadow of Ganymede, Jupiter’s (and the solar system’s) largest moon. This shadow transit takes place from 11:40 p.m. to 2:51 a.m. EDT.
Friday, May 13
First Quarter Moon occurs at 1:02 p.m. EDT. The half-lit orb rises just after noon local daylight time, appears highest in the south shortly before sunset, and sets around 2 a.m. The Moon spends this evening among the background stars of southwestern Leo the Lion, less than 5° from that constellation’s brightest star, Regulus.
Saturday, May 14
The Moon moves approximately 13° eastward relative to the starry background every 24 hours, and its motion carries it near Jupiter this evening. From North America, the two appear within 5° of each other all night. They will be in conjunction at 6 a.m. EDT tomorrow morning, when our satellite passes 2° due south of the planet.
Sunday, May 15
About 45 minutes after Mars rises, Saturn pokes above the southeastern horizon. Although the ringed planet pales in comparison to its neighbor, its yellow color contrasts nicely with the Red Planet’s hue. Throw in the ruddy glow of nearby Antares, the 1st-magnitude luminary of Scorpius, and you have a colorful trio of bright objects to follow throughout the late evening and morning hours. As you might guess, Saturn’s proximity to Mars means it also will reach opposition and peak visibility soon — in fact, it reaches this orbital highlight June 3. The view of Saturn through a telescope never fails to impress. This week, the world appears 18″ across and sports a beautiful ring system that spans 42″ and tilts 26° to our line of sight.
Source
Witches Of The Craft® 