We offer you the December 2019 astronomy calendar. Astronomy is the foundation upon which astrology can operate. Actually, astrology and astronomy were treated together, under the Latin name of astrologia, being separated only by the Western 17th century philosophy. For sure: a good astrologer needs to study astronomy.
Thursday, 12th December: Full Moon
The full moon is the lunar phase when the Moon appears fully illuminated from Earth’s perspective. This takes place when Earth is located directly between the Sun and the Moon. More exactly, the ecliptic longitudes of the Sun and Moon differ by 180°). This means that the lunar hemisphere facing Earth – the near side –appears as a circular disk (being completely sunlit), while the far side is dark.
December full moon was known by early Native American tribes as the Full Cold Moon, because this is the time of year when the cold winter air settles in and the nights become long and dark. Sometimes this moon is referred to as the Full Long Nights Moon, which is an appropriate name because the nights are now indeed long and the moon is above the horizon a long time. In Beard’s 1918 book, it is called the Wolves Moon, while in Farmers’ Almanac this is the name given to the January Full Moon.
Friday, 13th December, Saturday, 14th December: Geminids Meteor Shower
The Geminids are considered to be one of the most spectacular meteor showers of the year, with the possibility of sighting around 120 meteors per hour at its peak. The Geminids are a meteor shower caused by the object 3200 Phaethon, which is thought to be an asteroid with a “rock comet” orbit. This would make the Geminids, together with the Quadrantids, the only major meteor showers not originating from a comet. Meteors will radiate from the constellation Gemini, but can appear anywhere in the sky.
Saturday, 21st December, Sunday, 22nd December: Ursids Meteor Shower
The Ursids is a minor meteor shower producing about 5-10 meteors per hour. It is produced by dust grains left behind by comet Tuttle, which was first discovered in 1790. The shower is named the Ursids because the meteors seem to radiate from the direction of the constellation Ursa Minor in the sky. The Ursids are associated with the 8P/Tuttle comet. Meteors will radiate from the constellation Ursa Minor, but can appear anywhere in the sky.
Sunday, 22nd December: December Solstice
This is the first day of winter (winter solstice) in the Northern Hemisphere and the first day of summer (summer solstice) in the Southern Hemisphere. The South Pole of the Earth will be tilted toward the Sun, which will have reached its southernmost position in the sky and will be directly over the Tropic of Capricorn at 23.44 degrees south latitude.
Thursday, 26th December: New Moon
The New Moon occurs when the Sun and Moon are aligned, with the Sun and Earth on opposite sides of the Moon. Now, the Moon and Sun have the same ecliptic longitude, this being the first lunar phase. At this phase, the lunar disk is not visible to the unaided eye, except when silhouetted during a solar eclipse. This is the best time of the month to observe faint objects such as galaxies and star clusters because there is no moonlight to interfere.
Thursday, 26th December: Annular Solar Eclipse
An annular solar eclipse occurs when the Moon is too far away from the Earth to completely cover the Sun. This results in a ring of light around the darkened Moon. The Sun’s corona is not visible during an annular eclipse.
You can see this third solar eclipse of 2019 if you live in East of Europe, much of Asia, North and West of Australia, East of Africa, Pacific and Indian Ocean.