 Atacarina, the most luminous star system ever seen, is best known for an enormous eruption in the mid-19th century that hurled an amount of material at least ten times the sun's mass into space. Still shrouded by the expanding veil of gas and dust, Atacarina is the only object of its kind known in our galaxy. Here's a small portion of the rough and tumble neighborhood of swirling dust and gas near the star. This close-up view shows only a three-lightyear wide portion of the entire Atacarina nebula, which has a diameter of 200 light-years. Dramatic dark dust knots and complex structures are sculpted by the high-velocity stellar winds and high-energy radiation from the ultra-luminous variable Atacarina. These surveys have not found any Atacarina twins, underscoring its rarity. But in a 2015 survey released in 2016, five potential Atacarinas were found. This is one of them. These five objects mimic the optical and infrared properties of Atacarina, indicating that each very likely contains a high-mass star buried in five to ten solar masses of gas and dust. Further study will let astronomers more precisely determine their physical properties.