On March 21, 1864, the Italian mathematician, astronomer, and engineer Giovanni Domenico Cassini (8 June 1625 – 14 September 1712) discovered Saturn’s moons Tethys and Dione. Cassini used a refractor telescope with an aperture of 108 mm to make this observation.
Today’s (March 21) story of what happened this day in Science, Technology, Astronomy, and Space Exploration history.
On March 20, 1916, Albert Einstein sent a paper to Annalen der Physik, one of the oldest scientific journals on physics which has been published since 1799. The study was titled “Die Grundlage der Allgemeinen Relativitatstheorie”, translated as “The Foundation of the General Theory of Relativity.” It was the first comprehensive overview of the final version of Einstein’s theory of general relativity after several expositions in preliminary versions.
Today’s (March 20) story of what happened this day in Science, Technology, Astronomy, and Space Exploration history.
On March 19, 1986, IBM.com and sun.com domains were registered. These domains are the 11th and 12th oldest registered domains in history.
Today’s (March 19) story of what happened this day in Science, Technology, Astronomy, and Space Exploration history.
On March 18, 1965, Soviet cosmonaut Alexei Leonov stepped out from his Voskhod 2 spacecraft into the void of space and performed the first spacewalk in the history of space exploration.
Today’s (March 18) story of what happened this day in Science, Technology, Astronomy, and Space Exploration history.
On March 13, 1986, European Space Agency‘s (ESA) Giotto spacecraft made the closest approach to Halley’s Comet at a distance of 596 kilometers (370 miles).
Today’s (March 13) story of what happened this day in Science, Technology, Astronomy, and Space Exploration history.
On March 12, 1989, the English computer scientist who invented the World Wide Web, Sir Tim Berners-Lee sent a document to his colleagues at CERN titled “Information Management: A Proposal”. This proposal concerned the management of general information about the particle accelerators and experiments at The European Organization for Nuclear Research (CERN). In the proposal, Berners-Lee discussed the problems of information loss about complex evolving systems and suggested a solution based on a distributed hypertext system, which eventually became the World Wide Web, an Internet-based hypermedia initiative for global information sharing.
Today’s (March 12) story of what happened this day in Science, Technology, Astronomy, and Space Exploration history.
Covid-19, the highly-contagious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was declared a pandemic by the World Health Organization (WHO) on March 11, 2020.
Today’s (March 11) story of what happened this day in Science, Technology, Astronomy, and Space Exploration history.
Nicknamed “Paddle-Wheel Satellite”, NASA’s Pioneer 5 probe was launched on March 11, 1960, from Cape Canaveral Air Force Station.
Today’s (March 11) story of what happened this day in Science, Technology, Astronomy, and Space Exploration history.
On February 7, 1984, during the STS-41-B (the tenth NASA Space Shuttle mission and the fourth flight of the Space Shuttle Challenger), NASA astronaut Bruce McCandless II (June 8, 1937 – December 21, 2017) made the first-ever untethered free flight using the Manned Maneuvering Unit (see notes 1). With a distance of 98 meters (320 feet) from the space shuttle, he also broke the untethered spacewalking record.
On June 3, 1965, NASA astronaut Edward Higgins White II (November 14, 1930 – January 27, 1967) made history and executed the United States’ first spacewalk during the Gemini 4 mission. The first US spacewalk lasted 23 minutes, beginning over the Pacific Ocean and ending over the Gulf of Mexico.