The first images from the surface of Venus were received after the Soviet spacecraft Venera 9 landed on the planet.
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Astronomers Jeremiah Horrocks and William Crabtree recorded the first known observation of a transit of Venus across the sun.
Russian spacecraft Vega 2 landed on Venus.
A conjunction of Sun, Mercury, Venus, Mars, Jupiter, Saturn, and the Moon occurred.
Soviet Space Program's Vega 1, which was launched on December 15, 1984, released a space probe to enter Venus.
The Mariner 2 space probe completed the first-ever flyby of Venus.
