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The Soviet unmanned space mission Venera 9 lands on Venus

Venera 9, manufacturer's designation: 4V-1 No. 660, was a Soviet unmanned space mission to Venus. It consisted of an orbiter and a lander. It was launched in 1975, and had a mass of 4,936 kilograms. The orbiter was the first spacecraft to orbit Venus, while the lander was the first to return images from the surface of another planet.

The first xerographic copy

American physicist Chester Carlson and Austrian engineer Otto Kornei demonstrated xerography (the process itself was however invented by Hungarian physicist Pál Selényi). Carlson and Kornei copied the inscription 10-22-38 ASTORIA. Xerography is not only used for copying but also for printing in laser printers.

The first parachute jump

French balloonist and inventor André-Jacques Garnerin tested his frameless parachute. It was tied to the balloon basket. Garnerin first climbed to the height of approximately 1000 metres using the balloon. Then he untied the balloon, which continued to climb. Garnerin safely descended in the basket using the parachute.

Anniversaries of the (in)famous