The Sky This Week: May 24 – May 29
Tuesday, May 24
• Look high in the northwest after darkness falls this week and you’ll be greeted by the familiar sight of the Big Dipper. The Dipper is the sky’s most conspicuous asterism — a recognizable pattern of stars that doesn’t form a complete constellation shape. It forms the body and tail of Ursa Major the Great Bear. Use the Pointers, the two stars at the end of the Dipper’s bowl, to find Polaris, which lies due north for everyone north of the equator. Polaris marks the end of the Little Dipper’s handle. On evenings in late May, the relatively faint stars of this dipper arc almost directly above Polaris.
Wednesday, May 25
• Brilliant Jupiter appears high in the southwest as darkness falls and remains on display past 2 a.m. local daylight time. The giant planet shines at magnitude –2.1 — tying Mars as the brightest 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 38″. Notice in particular the two parallel dark belts that straddle a bright zone coinciding with the planet’s equator.
Thursday, May 26
• One of the spring sky’s finest deep-sky objects, the Beehive star cluster (M44) in the constellation Cancer the Crab, lies about one-third of the way from the western horizon to the zenith after darkness falls. With naked eyes under a dark sky, you should be able to spot this star group as a faint and fuzzy cloud. But the Beehive explodes into dozens of stars through binoculars or a small telescope at low power.
Friday, May 27
• Although Saturn will reach opposition and peak visibility one week from today, observers will be hard-pressed to see it as inferior this week. The ringed planet rises before 9 p.m. local daylight time and appears highest in the south around 1:30 a.m. Saturn shines at magnitude 0.0 and stands out against the relatively dim background stars of southern Ophiuchus. If you target the beautiful world through a telescope, you’ll see its 18″-diameter disk surrounded by a ring system that spans 42″ and tilts 26° to our line of sight.
Saturday, May 28
• Mars’ westward motion relative to the background stars carries it from Scorpius into Libra today. But for a quick change of pace, grab your binoculars tonight and target Zubenelgenubi (Alpha [a] Librae), the modestly bright star on the constellation’s opposite side. With even the slightest optical aid, Zubenelgenubi resolves into two stars. Nearly 4′ separate the 3rd-magnitude primary from the 5th-magnitude secondary.
See “10 tempting spring binocular targets” in the May issue of Astronomy for other treats visible through binoculars.
Sunday, May 29
• Last Quarter Moon arrives at 8:12 a.m. EDT. It rises around 1:30 a.m. local daylight time and climbs higher in the southeast as dawn approaches. During this period, our half-lit satellite lies near the center of Aquarius the Water-bearer.
Source
Witches Of The Craft® 