- 4.5 Billion Years Ago — A protoplanet collides with early Venus. The collision forces the planet upside down and pushes a debris field into orbit around the planet. Over the million years, the debris field would coalesce into Neith (the moon of Venus). The new moon stabilizes Venus' axis tilt and rotational speed.
- 1610 — Italian astronomer Galileo Galilei becomes the first to record the phases of Venus and discovers Neith.
- 1672 — Franco-Italian astronomer Giovanni Domenico Cassini becomes the first to observe Neith and provides the first details of the moon.
- January 22 — General Secretary Leonid Brezhnev is assassinated in Moscow. Premier Alexei Kosygin (over time) becomes the undisputed leader of the Soviet Union.
- December 15 — Soviet Venera 7 becomes the first man-made object to transmit data from the surface of Venus.
- October 22 — Soviet Venera 9 becomes the first man-made object to both orbit Venus, and the first to transmit images from the Venusian surface.
- March 1 — Soviet Venera 13 becomes the first man-made object to transmit color images from the Venusian surface, as well as the first confirmation of life on Venus.
- June 11 — Valentina Tereshkova becomes the first person to set foot on Venus. The Soviet Union begins to populate Venus.
- August 7 — The United States set foot on Venus.
- March 17 — Five Soviet settlements unite and declare independence as the Confederation of New Kamchatka (becoming the first independent nation on Venus).