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 women in the world's fastest growing sector.
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.
The World Day for Safety and Health at Work will focus on addressing the outbreak of infectious diseases at work, in particular, on the COVID-19 pandemic.
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.
May Day is a public holiday usually celebrated on 1 May or the first Monday of May. It is an ancient festival of spring and a current traditional spring holiday in many European cultures. Dances, singing, and cake are usually part of the festivities. In 1889, May Day was chosen as the date for International Workers' Day by the Socialists and Communists of the Second International to commemorate the Haymarket affair in Chicago. International Workers' […]
The Moon is at Last Quarter (or Third Quarter) - rising around midnight, and visible to the south after sunrise.
The Moon appears near the planet Jupiter in the southeastern predawn sky on this date.
Arthur Leonard Schawlow (May 5, 1921 – April 28, 1999) was an American physicist and co-inventor of the laser with Charles Townes. His central insight, which Townes overlooked, was the use of two mirrors as the resonant cavity to take maser action from microwaves to visible wavelengths. He shared the 1981 Nobel Prize in Physics with Nicolaas Bloembergen and Kai Siegbahn for his work using lasers to determine atomic energy levels […]