

Calendar
Astronomical Events
Anniversary of the 2013 Chelyabinsk Asteroid Impact Event
On February 15 2013 an asteroid exploded in the sky over the city of Chelyabinsk, in the the southern Ural region of Russia. The shock wave blew out windows all over the city, injuring over 1600 people, and damaged several buildings.
Vernal Equinox
The March equinox marks the beginning of astronomical spring and the end of astronomical winter in the Northern Hemisphere.
Total Solar Eclipse
The "Great American Eclipse" occurs on this date - don't miss it!
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. […]
Mars at Perihelion
On this day, Mars it closest to the Sun in its orbit.
Mercury at Greatest Elongation
Mercury will reach its greatest separation from the Sun on this date.
Conjunction of Uranus & the Sun
Uranus will pass close to the Sun in the sky as its orbit carries it around the far side of the solar system from the Earth.
Summer Solstice
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.
Earth at Aphelion
Earth will be at the farthest point in its orbit around the Sun on this date
International Asteroid Day
International Asteroid Day is a United Nations-recognized day observed each year on the anniversary of the Tunguska impact event of June 30, 1908.
Mercury 3.2°S of Moon
Mercury will appear close to the crescent Moon in the west-northwestern sky before sunset.