It was just a faint speck seen through powerful telescopes on Earth when astronomers discovered Comet C/2023 A3, also known as Comet Tsuchinshan-ATLAS, earlier this year. But despite this object’s unassuming initial appearance, its orbit was immediately eye-catching: Comet Tsuchinshan-ATLAS is on track to zip quite close to the sun and Earth alike in the autumn of 2024, setting the stage for what could be a fantastic celestial spectacle.