Calendar
International Day of Human Space Flight.
The General Assembly, in its resolution A/RES/65/271 of 7 April 2011, declared 12 April as the International Day of Human Space Flight “to celebrate each year at the international level the beginning […]
Yuri’s Night
Yuri’s Night is a global celebration of humanity’s past, present, and future in space. Yuri’s Night parties and events are held around the world every April in commemoration of Yuri […]
Moon at Apogee
Every month, the moon's eccentric orbit carries it to apogee – its most distant point from Earth.
Conjunction of the Moon and Mars
The waxing crescent Moon will appear near Mars in the western sky after sunset on April 17th.
Occlusion of Mars by the Moon
The Moon will pass in front of Mars, creating a lunar occultation visible from parts of Asia on April 17th.
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). […]
Sup. Conjunction of Mercury
Mercury will pass very close to the Sun in the sky as its orbit carries it around the far side of the solar system from the Earth.
First Quarter Moon
The First Quarter Moon occurs on April 19th - it is visible high in the southern sky in early evening.
World Creativity and Innovation Day.
During World Creativity and Innovation Day, April 21 (WCID) and Week April 15 – 21 (WCIW) individuals, families, teams, leaders, nations, organizations, students, and communities are acknowledged informed inspired encouraged […]
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 […]