Located roughly 10,000 light-years away in the constellation of Centaurus, the star IRAS 13481-6124 is twenty times the Sun's mass and about five times bigger in diameter. Using NASA's Spitzer Space Telescope, astronomers discovered the star is still in the last stage before its "birth," encircled by a telltale disc of dust and gas.
That sort of disc has never been seen around such a massive star before. Astronomers already knew smaller stars had these prenatal discs before they reached final mass, but they were unsure whether such discs could survive the intensely bright light of stars more than ten times the mass of the Sun. However, without the extra mass that these dust discs provide, it wasn't clear how such stars ever attained their final mass. As an alternative, astronomers had proposed massive stars were actually the result of smaller stars falling into each other and merging.