👉 Bimillenium is a term used in the context of astronomy and space exploration. It refers to an event that took place between two significant astronomical events, typically within 100 years (a "billion") apart. This concept was introduced by astronomer Carl Sagan in his book "The Hitchhiker's Guide to the Galaxy" as a way to compare the distance of the Earth from the Sun and the Moon. A "bimillenium" is a period
