Question

What was the great event in the history of astronomy that took place in 1758 as predicted far back in 1607?

Answer 1

It took several generations for Copernicus' calculations to take hold in the astronomy community, but when they did, they provided a powerful model for how objects move around the solar system and the universe. The comet appeared in 1531, 1607 and 1682. Halley suggested the same comet could return to Earth in 1758.