International Asteroid Day
International Asteroid Day is a United Nations-recognized day observed each year on the anniversary of the Tunguska impact event of June 30, 1908.
Calendar
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Calendar of Events
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Canada Day.
Canada Day (French: Fête du Canada) is the national day of Canada. A federal statutory holiday, it celebrates the anniversary of July 1, 1867, the effective date of the Constitution Act, 1867 (then called the British North America Act, 1867), which united the three separate colonies of the Province of Canada, Nova Scotia, and New Brunswick into a single Dominion within the British Empire […]
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Thomas Harriot, mapped the Moon with a telescope 4 months before Galileo (d. 1621)
Thomas Harriot was an English astronomer, mathematician, ethnographer and translator who made advances within the scientific field. Thomas Harriot was recognized for his contributions in astronomy, mathematics, and navigational techniques. Harriot worked closely with John White to create advanced maps for navigation. While Harriot worked extensively on numerous papers on the subjects of astronomy, mathematics and navigation, the amount of work that he actually […]
First Quarter Moon 2025
The Moon is at First quarter on this date -it will be visible high in the southern sky in early evening.
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Independence Day (USA)
Independence Day is a U.S. federal holiday commemorating the Declaration of Independence of the United States, on July 4, 1776.
NASA’s Pathfinder lands on Mars, 1977
Mars Pathfinder was launched December 4, 1996 and landed on Mars' Ares Vallis on July 4, 1997.
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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.
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Full Moon Zoom with Sean van Staden, S.J.
Virtual Event
Full Moon Zoom with Sean van Staden, S.J.
Join us on July 10th for our next Full Moon-th On-line Meetup! Our guest will be Sean van Staden SJ., a Jesuit scholastic about to begin his Theology studies at Hekima College in Nairobi, Kenya. He was one of the participants of the 2025 Vatican Observatory Summer School in Castel Gandolfo. Click Here to read post with more […]
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Mercury at Aphelion
Mercury's 88-day orbit around the Sun will carry it to its furthest point to the Sun – its aphelion – at a distance of 0.47 AU.
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Last Quarter Moon 2025
The Moon is at Last Quarter (or Third Quarter) – rising around midnight, and visible to the south after sunrise.
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Thomas Kuhn born 1922
Thomas Samuel Kuhn (1922–1996) is one of the most influential philosophers of science of the twentieth century,
Last Quarter Moon
The Moon is at Last Quarter (or Third Quarter) – rising around midnight, and visible to the south after sunrise.
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J. G. Mendel born 1822
J. G. Mendel born 1822
Gregor Johann Mendel (1822– 1884) was a biologist, meteorologist, mathematician, Augustinian friar and abbot of St. Thomas' Abbey in Brünn (Brno), Margraviate of Moravia.
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New Moon 2025
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 in shadow then. Pictured here is the traditional New Moon, the earliest visible waxing crescent, which signals the start of a new month in many […]
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St. Ignatius Loyola, Founder of the Jesuits.
Ignatius of Loyola (Basque: Ignazio Loiolakoa; Spanish: Ignacio de Loyola; Latin: Ignatius de Loyola; c. 23 October 1491 – 31 July 1556) was a Spanish Basque Catholic priest and theologian, who co-founded the religious order called the Society of Jesus (Jesuits) and became its first Superior General at Paris in 1541. The Jesuit order served the Pope as missionaries, and they were bound by a vow of special obedience to the sovereign pontiff in […]
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First Quarter Moon 2025
The Moon is at First quarter on this date -it will be visible high in the southern sky in early evening.