Through the weekend of Saturday, Oct. 19, and Sunday, Oct. 20, you'll be able to see a rare comet in the sky each evening above north Georgia. Comet C/2023 A3, known as Comet Tsuchinshan-ATLAS, will be visible about 30 minutes after sunset and can be seen in the western sky. James Wray, professor in the School of Earth and Atmospheric Sciences, discusses his research on the comet and the Oort Cloud.  "The human mind may find it difficult to conceptualize: a cosmic cloud so colossal it surrounds the Sun and eight planets as it extends trillions of miles into deep space," Wray says. "The spherical shell known as the Oort Cloud is, for all practical purposes, invisible."