The Astronomy Picture of the Day features NGC 4372, a globular cluster, along with a mysterious dark object known as the Dark Doodad. NGC 4372 is a large and ancient cluster of stars located in the southern constellation of Musca. The Dark Doodad is a small, dark cloud of gas and dust that is seen in front of the cluster.

Source: https://science.nasa.gov/image-article/apod-2026-july-31-ngc-4372-and-the-dark-doodad/