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The sky is not a painting, it's a movie. Stars pulse, flare, some explode as supernova, asteroids whiz by the earth, new comets appear in the sky, Aurora sets the northern skies ablaze and meteors streak through Earth's atmosphere.
The Winter Solstice occurs at 6:03 pm EST on December 21. The Sun reaches its southernmost celestial latitude of the year. On this day the shortest period of daylight begins in the Northern hemisphere. Summer begins in the Southern hemisphere.
The Full Moon for December
December is known as the The Full Cold Moon; or the Full Long Nights Moon. December nights are at their longest and darkest. This full Moon is also known as the Moon before Yule. The midwinter full Moon has a high trajectory across the sky because it is opposite a low Sun.
December Lunar Highlights
On December 11th, Jupiter lies about 6° to the upper left of the gibbous Moon On December 19th Saturn lies just 3° below the narrow crescent Moon as both rise on the 19th. On December 24th the crescent Moon passes within an Angular separation: 06°degrees from Mars.
The Planets Visibility for December
Evening sky SW Currently lost in Suns glare.
Mercury is lost in the Suns glare until late December when it becomes a bit easier to see. In early January Venus and Mercury come closer together in the evening sky.
Evening sky SW
Venus early December is just beginning to emerge from the Sun's glare. Venus by late December is an easy object to see in the south western horizon shining at -3.9 magnitude in the constellation Sagittarius.
Evening sky SW
Mars midmonth is at +1.1 magnitude and a diameter of 00'.05" located in the constellation Capricornus and sets at 8:09 p.m.. To find Mars look for a reddish object low in the southwest sky. On December 24th the crescent Moon passes within an Angular separation: 06°30'44" from Mars. On December 24th a faint comet 15P/Finlay is only Angular separation of 00°11'16" from Mars. A large telescope is needed to see the faint 12.5 magnitude comet.
To see which part of the surface is visible at any time, check out the Mars Profiler at Sky & Telescope Magazine's web page.
Evening - Morning sky SW
Early December Jupiter is at -2.4 magnitude and a diameter of 00'.43" located in the constellation Leo the Lion. Jupiter rises in the east around 9:51 p.m. on December 6th. Jupiter on December 11th is an Angular separation of 05°44'39" from the 71.69 % phase gibbous moon.
Morning sky ESE
Saturn is just emerging from the Suns glare and rises around 5:30 very low in the ESE morning sky just before sunrise. Saturn is at +0.5 magnitude and diameter 00'.15". Saturn is in the constellation Libra. On the 19th of December the crescent new Moon at 8.32% lit and Saturn are visible in the morning sky just before dawn as shown below.
Through a small telescope Saturn will reveal the famous rings of the planet. Rings currently are 22.7 tilt. See: Saturn's moons locations
Evening Sky SW
Uranus midmonth is at 5.8 magnitude and diameter 00'.04" and is up in the southern sky after sunset setting at 1:36 a.m. midmonth. Uranus is located in the constellation Pisces. A moderate-sized telescope will show it as a green-gray disk. See: Sky and Telescope location PDF. Courtesy: Sky and Telescope
Evening Sky S
Neptune midmonth is at 7.9 magnitude and diameter 00'.02" is up after sunset visible in the south and sets 10:21 p.m.. A moderate-sized telescope will show it as a blue green disk. Neptune is located in the constellation Aquarius. See: Sky and Telescope location PDF. Courtesy: Sky and Telescope
Pluto at midmonth is visible in the southwest right after sunset very low on the horizon and is amid the stars of the Milky Way in the constellation Sagittarius. Pluto is at magnitude +14.2 and diameter 00'.01" A large telescope is needed to see this distant object.
Comets Brighter than 8 Magnitude
No bright comets visible for northern hemisphere.
For more on current Comets and locations see: Seiichi Yoshida web site here.
MAJOR METEOR SHOWERS
The Geminid meteor shower peaks on the night of Saturday evening/Sunday morning on December 13/14th, when meteor rates can be 60-120 meteors per hour. Best time to observe meteors is around 2:00 a.m. when the radiant is highest in the sky but can be seen as early as around 8:00 p.m. onwards till the meteors become lost in dawns light. Geminid meteor activity begins December 4th thru December 18th. The 53% lit Moon rises during the second half of the night around midnight on the night of the peak and will diminish seeing the fainter meteors. Dress warm and enjoy the meteor shower all night long. The source for the Geminids is the asteroid 3200 Phaethon. See radiant for Geminids below. The yellow circle and meteor lines indicates the radiant where direction of meteors will appear from.
The Ursid Meteors
The Ursid meteors peak on the 22/23nd with around 10 meteors per hour. This meteor shower is active during the period spanning December 17 to 25. The shower occurs under favorable moonlight conditions. The comet 8P/Tuttle is the source for this meteor shower.
Some local links below to Heavens Above satellite information website.
Also see: Spaceflight NASA
Real time solar wind dials are linked live to the ACE Spacecraft.
If the dial on the left (Magnetic Field) has dipped below zero, the speed is high and the dial dynamic pressure is in the yellow/red, be alert for Aurora. Anytime the gauges are in the Red and the dial on the left, the Magnetic Field BZ has dipped to the yellow-red... Aurora will be occurring in our area. See link to solar wind gauge here: REAL TIME SOLAR WIND
See explanation of solar wind dials below by clicking on photo of dials
Solar Wind Dials