Valeri Polyakov set the longest duration spaceflight record (437.7 days) on March 22, 1995

On March 22, 1995, Russian cosmonaut Valeri Vladimirovich Polyakov returned to Earth from space aboard Soyuz TM-20. During this flight (it was Polyakov’s second spaceflight), he completed just over 7,000 orbits of the Earth. On 9 January 1995, after 366 days in space, Polyakov formally broke the spaceflight duration record previously set by the Soviet …

ESA’s Planck spacecraft revealed the most detailed map of the Cosmic Microwave Background on March 21, 2013

On March 21, 2013, European Space Agency‘s (ESA) Planck spacecraft revealed the most detailed map ever created of the Cosmic Microwave Background (CMB, CMBR). Today’s (March 21) story of what happened this day in Science, Technology, Astronomy, and Space Exploration history.

Cassini discovered Saturn’s moons Tethys and Dione on March 21, 1864

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 …

Einstein’s Theory of General Relativity was published as an academic paper on March 20, 1916

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 …

IBM.com and sun.com were registered on March 19, 1986

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.

The first spacewalk was performed by Alexei Leonov on March 17, 1965

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.

Giotto spacecraft made the closest approach to Halley’s Comet on March 13, 1986

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.

Tim Berners-Lee made the first proposal for a World Wide Web on March 12, 1989

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, …

Covid-19 was declared a pandemic on March 11, 2020

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.

Pioneer 5 was launched on March 11, 1960

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.