International Chernobyl Disaster Remembrance Day
An explosion at the Chernobyl Nuclear Power Plant in 1986 spread a radioactive cloud over large parts of the Soviet Union; millions of people in the three countries were exposed to the radiation.
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Yom HaShoah begins at sunset
Yom HaShoah begins at sunset
Yom Hazikaron laShoah ve-laG'vurah (Hebrew: יום הזיכרון לשואה ולגבורה, lit. 'Holocaust and Heroism Remembrance Day'), known colloquially in Israel and abroad as Yom HaShoah (יום השואה) and in English as Holocaust Remembrance Day, or Holocaust Day, is observed as Israel's day of commemoration for the approximately six million Jews murdered in the Holocaust by Nazi Germany and its collaborators, and for the Jewish resistance in that period. - Wikipedia
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International Girls in Information and Communications Technology (ICT) Day
On Girls in ICT Day– marked annually on the fourth Thursday in April – the United Nations International Telecommunication Union (ITU) is highlighting the need to promote technology career opportunities for girls and women in the world's fastest growing sector.
World Day for Safety and Health at Work
The World Day for Safety and Health at Work will focus on addressing the outbreak of infectious diseases at work, in particular, on the COVID-19 pandemic.
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Mercury at Greatest Elongation
Mercury will reach its greatest separation from the Sun in its Jun–Jul 2021 morning apparition. It will be shining brightly at mag 0.3.
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Conjunction of Venus and Jupiter
Jupiter and Venus will appear less then 1° apart in the eastern predawn sky on April 30th.
Partial Solar Eclipse
On Saturday, April 30, 2022, people in parts of southern South America, Antarctica, and the Pacific and Southern Oceans will have a chance to witness a partial eclipse of the Sun just before and during sunset.
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 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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Cinco de Mayo
Mother's Day in the United States is an annual holiday celebrated on the second Sunday in May. Mother's Day recognizes mothers, motherhood and maternal bonds in general, as well as the positive contributions that they make to society. It was established by Anna Jarvis, with the first official Mother's Day celebrated through a service of worship at St. Andrew's Methodist […]
Eta-Aquariid Meteor Shower
The Eta Aquariids are a strong shower when viewed from the southern tropics. From the equator northward, they usually only produce medium rates of 10-30 per hour just before dawn. Activity is good for a week centered the night of maximum activity. These are swift meteors that produce a high percentage of persistent trains, but […]
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Astronomy Day
Astronomy Day is an international event observed each fall and spring near the first quarter Moon. Local astronomical societies, planetariums, museums, and observatories sponsor public viewing sessions, presentations, workshops, and other activities to increase public awareness about astronomy and our wonderful universe.
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First Quarter Moon
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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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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World Metrology Day.
World Metrology Day is an annual celebration of the signature of the Metre Convention on 20 May 1875 by representatives of seventeen nations. The Convention set the framework for global collaboration in the science of measurement and in its industrial, commercial and societal applications. The original aim of the Metre Convention - the world-wide uniformity […]
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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 the planet), and over the course of a couple weeks, Mercury will change from appearing in the evening sky to appearing in the morning sky.
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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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(New York, NY) Lecture: From Peru to Mars: New Worlds and Jesuit Science
(New York, NY) Lecture: From Peru to Mars: New Worlds and Jesuit Science
PRESENTER Br. Guy Consolmagno, S.J. Director of the Vatican Observatory and President of the Vatican Observatory Foundation Is there a particularly “Jesuit” form of science? From Acosta’s work in the New World to modern research at the Vatican Observatory, we’ll look at the work of a number of Jesuit scientists through history and see how […]
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Towel Day
Towel Day is an annual celebration on the 25th of May, as a tribute to the late author Douglas Adams (1952-2001). On that day, fans around the universe carry a towel in his honor. Towel Day 2021 marks the 43rd anniversary of the first BBC broadcast of The Hitchhiker’s Guide to the Galaxy (1978).
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Conjunction of the Moon and Venus
The Waning Crescent Moon appears 8° from Venus in the eastern predawn sky.
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Conjunction of Mars and Jupiter
Mars and Jupiter appear less than 1° apart in the eastern predawn sky
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Memorial Day
Memorial Day is an American holiday, observed on the last Monday of May, honoring the men and women who died while serving in the U.S. military. Memorial Day 2021 will occur on Monday, May 31. Originally known as Decoration Day, it originated in the years following the Civil War and became an official federal holiday […]
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 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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World Bicycle Day.
In April 2018, the United Nations General Assembly declared June 3 as International World Bicycle Day. The resolution for World Bicycle Day recognizes "the uniqueness, longevity and versatility of the bicycle, which has been in use for two centuries, and that it is a simple, affordable, reliable, clean and environmentally fit sustainable means of transport." Read More: https://www.un.org/en/observances/bicycle-day https://en.wikipedia.org/wiki/World_Bicycle_Day