Calendar

Moon at Perigee

Every month, the Moon’s eccentric orbit carries it to perigee, the Moon’s closest point to Earth in its orbit – then 2 weeks later, to apogee, its most distant point from Earth.

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.

Piscis Austrinids

The Piscis Austrinids are a faint Meteor Shower that radiate from an area to the west of the brightest star Fomalhaut in the constellation of Piscis Austrinus - the southern […]

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 […]

V. Ambartsumian, theoretical astrophysicist, d. 1996

Viktor Amazaspovich Ambartsumian was a Soviet Armenian astrophysicist and science administrator. One of the 20th century's top astronomers, he is widely regarded as the founder of theoretical astrophysics in the Soviet Union.