New Year’s Day
The year in the Roman calendar naturally starts on March 1. After all, the words September, October, November, and December literally mean Seventh Month, Eighth Month, Ninth Month, and Tenth […]
Calendar
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Earth at Perihelion
Earth will be at the closest point in its orbit around the Sun on this date - 91,403,034 miles.
Feast of the Epiphany
Epiphany also known as Theophany in the east, is a Christian feast day that celebrates the revelation (theophany) of God incarnate as Jesus Christ. Articles about the Feast of the Epiphany on the VO Faith and Science […]
Full Moon
The Full Moon rises at sunset, and is visible all night. The Vatican Observatory's monthly Full Moon Meetup for Sacred Space Astronomy subscribers is held at 10:00 AM Tucson time.
Inf. Conjunction of Mercury
Mercury passes very close to the Sun in the sky as its orbit carries it between the Sun and Earth. This happens once in 116 days (the synodic cycle of […]
Moon at Apogee
The Moon’s distance from Earth varies throughout its monthly orbit because the Moon’s orbit isn’t perfectly circular. Every month, the Moon’s eccentric orbit carries it to apogee – its most distant point from […]
World Science Day for Peace and Development.
Celebrated every 10 November, World Science Day for Peace and Development highlights the significant role of science in society and the need to engage the wider public in debates on […]
Last Quarter Moon
The Moon is at Last Quarter (or Third Quarter) – rising around midnight, and visible to the south after sunrise.
Charles Babbage’s paper on the difference engine, 1822
Charles Babbage (1791-1871), computer pioneer, designed two classes of engine, Difference Engines, and Analytical Engines. Difference engines are so called because of the mathematical principle on which they are based, […]
Martin Luther King Jr. Day.
"Martin Luther King Jr. (January 15, 1929 – April 4, 1968) was an American Baptist minister and activist who became the most visible spokesperson and leader in the civil rights movement from 1955 until his assassination […]
New Moon
New Moon. 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 […]
International Holocaust Remembrance Day
The United Nations General Assembly designated January 27—the anniversary of the liberation of Auschwitz-Birkenau—as International Holocaust Remembrance Day. On this annual day of commemoration, the UN urges every member state to honor […]