A comet that hasn't been observed from Earth since the time of the Neanderthals is making a return, and astronomers believe it may be visible to the naked eye. Comet C/2023 A3 (Tsuchinshan–Atlas) was discovered by astronomers early last year and is estimated to have an orbital period of approximately 80,000 years, following a highly elongated trajectory around the sun. As it approaches Earth, this ancient celestial visitor is generating excitement among stargazers and scientists alike.