If there is one star that serves to announce the arrival of fall as the leaves have begun to turn, unquestionably that title would have to go to Fomalhaut.

Fomalhaut, the 'solitary' star, announces the arrival of autumn in the night sky. Here's how to see it

Source: space
Source Link: https://www.space.com/stargazing/fomalhaut-the-solitary-star-announces-the-arrival-of-autumn-in-the-night-sky-heres-how-to-see-it