Comet 12P/Pons-Brooks photographed on March 7, 2024 (Credit: Nielander/ CC0/ Wikimedia Commons)

On April 21, 2024, the 10.5-mile-wide (17 km) Comet 12P/Pons-Brooks, also called "Devil Comet," will make its closest approach to the Sun. As it comes near the star, the comet will brighten significantly and be visible in the western sky an hour after sunset. The icy rock will appear as a fuzzy glowing patch with a faint tail streaking behind.