Sun Mon Tue Wed Thu Fri Sat
1
2
3
4
5
6
St. Nicholas.
St. Nicholas.
Dec 6 all-day
St. Nicholas.
A depiction of Saint Nicholas with his sack standing next to a Nativity Scene. Credit: Wikimedia commons. Saint Nicholas Day, observed on December 5/6 in Western Christian countries and December 19 in Eastern Christian countries, is the feast day of Saint Nicholas. It is celebrated as a Christian festival Continue reading →
9
10
Ch Fabry died, 1945 (b. 1867).
Ch Fabry died, 1945 (b. 1867).
Dec 10 all-day
Ch Fabry died, 1945 (b. 1867).
Maurice Paul Auguste Charles Fabry ForMemRS (French: [fabʁi]; 11 June 1867 – 11 December 1945) was a French physicist. Life Fabry graduated from the École Polytechnique in Paris and received his doctorate from the University of Paris in 1892, for his work on interference fringes, which established him as Continue reading →
Hanukkah begins at sunset (Jewish).
11
International Mountain Day.
International Mountain Day.
Dec 11 all-day
International Mountain Day.
Mountains are home to 15% of the world´s population and host about half of the world’s biodiversity hotspots. They provide freshwater for everyday life to half of humanity. Their conservation is a key factor for sustainable development and is part Continue reading →
12
Our Lady of Guadalupe.
Our Lady of Guadalupe.
Dec 12 all-day
Our Lady of Guadalupe.
Our Lady of Guadalupe (Spanish: Nuestra Señora de Guadalupe), also known as the Virgin of Guadalupe (Spanish: Virgen de Guadalupe), is a Catholic title of the Blessed Virgin Mary associated with a series of five Marian apparitions in December 1531, and a venerated image on a cloak enshrined within Continue reading →
Venus 0.8°S of Moon (13:40 MST).
13
Geminid Meteor Shower.
Geminid Meteor Shower.
Dec 13 all-day
Geminid Meteor Shower.
Geminid Meteor Shower Next period of activity: December 4th, 2020 to December 17th, 2020 Peak: Dec 13-14, 2020 – the Moon will be 0.2% illuminated. The Geminids are usually the strongest meteor shower of the year and meteor enthusiasts are Continue reading →
St. Lucia (Sweden), festival of light.
St. Lucia (Sweden), festival of light.
Dec 13 all-day
St. Lucia (Sweden), festival of light.
Saint Lucy’s Day, also called Lucia Day or the feast of Saint Lucy, is a Christian feast day observed on 13 December. The observance commemorates Lucia of Syracuse, an early-4th-century virgin martyr under the Diocletianic Persecution, who according to legend brought food and aid to Christians hiding in the Roman catacombs, wearing Continue reading →
14
New Moon (09:17 MST).
New Moon (09:17 MST).
Dec 14 all-day
New Moon (09:17 MST).
By the modern definition, New Moon occurs when the Moon and Sun are at the same geocentric ecliptic longitude. The part of the Moon facing us is completely in shadow then. Pictured here is the traditional New Moon, the earliest visible Continue reading →
Total Solar Eclipse, Southern Chile and Argentina.
15
Venera 7 lands on Venus, 1970.
Venera 7 lands on Venus, 1970.
Dec 15 all-day
Venera 7 lands on Venus, 1970.
Venera 7 (Russian: Венера-7, meaning Venus 7) was a Soviet spacecraft, part of the Venera series of probes to Venus. When it landed on the Venusian surface on 15 December 1970, it became the first spacecraft to soft land on another planet and the first to transmit data from there Continue reading →
16
17
18
20
21
Jupiter 6′ of Saturn (11:20 MST)
Jupiter 6′ of Saturn (11:20 MST)
Dec 21 all-day
Jupiter 6' of Saturn (11:20 MST)
At 11:20 MST Jupiter and Saturn will be in an extremely close conjunction, separated only by 6 minutes of arc, i.e., 1/5 moon’s diameter. It will be quite a treat because it will be possible to observe both planets at Continue reading →
Mayflower lands at Plymouth Rock, 1620.
Mayflower lands at Plymouth Rock, 1620.
Dec 21 all-day
Mayflower lands at Plymouth Rock, 1620.
It’s been 400 years since the Mayflower arrived in Provincetown Harbor, and local and international organizations spent a decade planning months of quadricentennial commemorative events, many of which were upended by the coronavirus pandemic. But while our nation has a Continue reading →
Winter Solstice (03:03 MST).
22
Ursids Meteor Shower.
Ursids Meteor Shower.
Dec 22 all-day
Ursids Meteor Shower.
Ursids Meteor Shower Next period of activity: December 17th, 2020 to December 26th, 2020 Peak: Dec 21-22, 2020 – the moon will be 52% illuminated. The Ursids are often neglected due to the fact it peaks just before Christmas and Continue reading →
23
26
27
28
29
Full Moon (20:28 MST).
Full Moon (20:28 MST).
Dec 29 all-day
Full Moon (20:28 MST).
Full Moon. Rises at sunset, high in the sky around midnight. Visible all night. Moon overview on solarsystem.nasa.gov
Maria M. Kirch died, 1720 (b. 1670).
Maria M. Kirch died, 1720 (b. 1670).
Dec 29 all-day
Maria Margaretha Kirch (née Winckelmann, in historic sources named Maria Margaretha Kirchin; 25 February 1670 – 29 December 1720) was a German astronomer, and one of the first famous astronomers of her period due to her writings on the conjunction of the sun with Saturn, Continue reading →
30

Sharpless 239 in Taurus, by Mark Hanson – Stellar Winds Observatory, USA. This eerie cloud of gas and dust lie about 450 light years away in the southern end of the Taurus molecular cloud.