Calendar

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 […]

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.

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 […]

Uranus at Opposition

Uranus will be in opposition to the Sun on this date; this is when the Earth is positioned between the Sun and Uranus. 

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 […]