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). […]
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). […]
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.
The First Quarter Moon occurs on April 19th - it is visible high in the southern sky in early evening.
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 […]
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 […]
First held in 1970, Earth Day is held annually on April 22 to demonstrate support for environmental protection.
On Girls in ICT Day– marked annually on the fourth Thursday in April – the United Nations International Telecommunication Union (ITU) is highlighting the need to promote technology career opportunities for girls and […]
The Hubble Space Telescope was launched into orbit aboard the Space Shuttle Discovery on April 24, 1990.
Mercury's 88-day orbit around the Sun will carry it to its closest point to the Sun – its perihelion – at a distance of 0.31 AU from the Sun.
An explosion at the Chernobyl Nuclear Power Plant in 1986 spread a radioactive cloud over large parts of the Soviet Union; millions of people in the three countries were exposed to the radiation.
The Full Moon rises at sunset, is visible high in the sky around midnight, and is visible all night.
Supermoon: Full Moon at the Moon's perigee - the Moon's closest point to Earth in its monthly orbit.