Saturday morning August 24th about an hour before sunrise local time look for the 23-day old waning gibbous Moon to be about 1o from the reddish star Aldebaran. Aldebaran represents the ‘angry eye’ of Taurus the Bull, and is at the end of the v-shaped open star cluster, the Hyades.
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Our Moon reaches apogee, (greatest distance from Earth), for this orbit, on Saturday August 17th. At that time the Moon will be at a distance of 31.84 Earth diameters 251,954 miles (405,480 km) from the Earth.
On the day of the apogee Moon the 17-day old waning gibbous Moon rises about 1 hour before midnight local time and sets later the following morning.
Does our Moon actually go around the Earth as this graphic shows? From our perspective on the Earth the Moon appears to circle around the Earth. However, in reality, the Moon orbits the Sun together with the Earth*
*Click here to read my 2006 Scope on the Sky column “The Real Shape of the Moon’s Orbit”. (PDF)
Read this very informative article about the Earth-Moon system and their orbital motions, written by Joe Hanson. “Do We Orbit the Moon?”
Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to go to bobs-spaces.
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While August signals the end of summer vacation for students and teachers, for sky-watchers the month signals the beginning of the Perseid meteor shower. This annual event occurs when the Earth passes through the path of debris left behind by the Comet P/SwiftTuttle. The Perseids, like all meteor showers, are named for the region of the sky that the meteors seem to radiate from. The Perseids radiant is within the constellation Perseus.
The meteor shower lasts slightly longer than a month, beginning around July 17 and ending around August 24. The best times for viewing, when the maximum number of meteors could be seen (under ideal conditions), is the peak night, on August 13th. The best time for viewing the meteors is after midnight and in the couple of hours before the Sun rises. At this time, our position on the Earth will face directly into the “cloud” of debris.
This year the peak night is 3 days before full Moon which is good news because the waxing gibbous Moon will set at around 4-5 am local time as the area around the Pleiades and the radiant rise in the east. This leaves maybe 2 hours of viewing before the sky brightens too much.
Where should you look to find Perseus and the meteors? For those viewing from mid-northern latitudes (40-50 degrees Perseus rises around midnight over the northeast horizon. By early morning, the Perseids radiant is very high, nearly overhead toward the northeast horizon.
One Perseid Down- Many More to Go?
Perseids: The Peak Night
Here is a wonderful short video about a falling star by Sascha Geddert.
Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.
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Monday August 12th the Moon will be crossing the plane of the ecliptic moving south. This is known as the descending node, one of two intersections the Moon’s orbital path (dark green line) has with the ecliptic.
On the day of the node crossing the 12.0-day old waxing gibbous Moon will be over the southern horizon and will be about 6-7o to the east from the ringed planet Saturn. Jupiter shines brightly further to the west near the reddish star Antares. With binoculars or telescope the dwarf planet Ceres may be visible.
Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.
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Sunday August 11th, over the southern horizon, the outer planet Jupiter will be about 6-7o from the reddish star Antares in Scorpius the Scorpion. A little further east, just above the handle of the teapot-shaped Sagittarius, is the outer planet Saturn and the 11-day old waxing gibbous Moon separated by about 1-2o.
Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.
Also Follow me and other great resources at Feedspot.
Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.
Also Follow me and other great resources at Feedspot.
Over the next couple of evenings the waxing gibbous Moon will pass by two outer planets, Jupiter and Dwarf Planet Ceres. On the 8th the 8-day old waxing gibbous Moon will be about 2o from the Dwarf Planet Ceres, and on the 9th the 9-day old Moon will be about 2o from Jupiter.
Monday evening August 5th the 5-day old waxing crescent Moon will be within about 5-6o from the blue-white star Spica over the southwestern horizon. Both will set shortly before midnight local time.
Spica is part of the constellation Virgo the Harvest Maiden and represents a bundle of grasses, perhaps wheat, in her left hand.
Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.
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