The Brightest Star in the Sky, Sirius, was Hiding a Cluster of Stars. Found by Gaia - https://www.technology.org/2018/01/31/the-brightest-star-in-the-sky-sirius-was-hiding-a-cluster-of-stars-found-by-gaia/ https://www.technology.org/texorgwp/wp-content/uploads/2018/01/Obscured_Sirius_reveals_Gaia_1_cluster_node_full_image_2-576x432.jpg