Simulations Solve a 20-Year-Old Riddle About Why Nebulae Around Massive Stars Don't Disappear


The birth of the most massive stars—those ten to a hundred times the mass of the Sun—has posed an astrophysical riddle for decades. Massive stars are dense enough to fuse hydrogen while they’re still gathering material from the gas cloud, so it was a mystery why their brilliant radiation does not heat the infalling gas and blow it away.