In 1718, Edmond Halley discovered the proper motion of stars by comparing historical observations, showing they change positions over time rather than being fixed. This insight advanced stellar astronomy. It challenged ancient cosmological views and refined understanding of the universe's scale.

The discovery of the proper motion of stars in 1718 revealed the changing heavens, influencing Romantic ideas of mutable nature. Poets like William Wordsworth incorporated these celestial themes into their works, reflecting on the vastness of the universe, while also inspiring later poets like John Keats, who explored the interplay between nature and the cosmos.