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.
A Total Lunar Eclipse occurs on this night
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.
The Waning Crescent Moon appears 8° from Venus in the eastern predawn sky.
Mars and Jupiter appear less than 1° apart in the eastern predawn sky
On this day, Mars it closest to the Sun in its orbit.
The summer solstice is the day when the Sun appears to reach its highest point in the sky during the year - it marks the start of summer in the Northern Hemisphere.
On this day, the Moon will be at its most distant point from Earth in its orbit.
International Asteroid Day is a United Nations-recognized day observed each year on the anniversary of the Tunguska impact event of June 30, 1908.
Earth will be at the farthest point in its orbit around the Sun on this date - 94,510,886 miles.
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.
On this day, the Moon will be at its most distant point from Earth in its orbit.