Megamasers and Cosmology
Artist’s conception illustrating a disk of water-bearing gas orbiting the supermassive black hole at the core of a distant galaxy. By observing maser emission from such disks, astronomers can use geometry to measure the distance to the galaxies, a key requirement for calculating the Hubble Constant.
Credit: S. Dagnello
Part of Collections:Image of the Week
Have you reviewed our Media Use Policy?