NASA’s Hubble Helps Solve Mystery of Ultra-Compact, Burned-Out Galaxies

An odyssey of exploration began on 25 April 1990, when Steve Hawley gingerly pulled Discovery’s robot arm away from the Hubble Space Telescope. Photo Credit: NASA

Astronomers using NASA’s Hubble Space Telescope and Europe’s Herschel Space Observatory have pieced together the evolutionary sequence of compact elliptical galaxies that erupted and burned out early in [...]