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.
Calendar
12 events found.
Mars at Aphelion
Mars will be at the farthest point in its orbit around the Sun on this date - 154,425,919.9 miles.
J. A. Fleming died, 1945 (b. 1849).
Illustration from the Bibliographical Memoirs of Fellows of the Royal Society, 1945. The Royal Society, London. Sir John Ambrose Fleming FRS died in 1945, aged 95 (born 29 November 1849). "He was an English electrical engineer and physicist who invented the first thermionic valve or vacuum tube, designed the radio transmitter with which the first […]
Last Quarter Moon 2025
The Moon is at Last Quarter (or Third Quarter) – rising around midnight, and visible to the south after sunrise.
Last Quarter Moon
The Moon is at Last Quarter (or Third Quarter) – rising around midnight, and visible to the south after sunrise.
International Earth Day
First held in 1970, Earth Day is held annually on April 22 to demonstrate support for environmental protection.
Lyrids Meteor Shower
Peak: ~Apr 21-22, 2020 The Lyrids are a medium strength shower that usually produces good rates for three nights centered on the maximum. These meteors also usually lack persistent trains but can produce fireballs. These meteors are best seen from the northern hemisphere where the radiant is high in the sky at dawn. Activity from […]
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.
A Jesuit’s Guide to the Stars: Exploring Wonder, Beauty, and Science
Church of Saint Thomas More 1079 Summit Avenue, Saint Paul, Minnesota, United StatesCurious about God, the cosmos and you?You can ask the Pope’s astronomer!Come with your curiosity and questions to hear Brother Guy Consolmagno, SJ, 7:00 pm, Thursday, April 24, 2025, at Saint Thomas More Catholic ChurchIn his new book, A Jesuit Guide to the Stars, Brother Guy Consolmagno, SJ, asks, “Do we need to know about the […]
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.
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 […]
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.