'Post-Menopausal' Galaxies Studied By Hubble Telescope | Video
Galaxies no longer producing stars (quenched galaxies) have long puzzled astronomers with how they grow. Now Hubble Space Telescope and European Southern Observatory's VISTA have shown that larger galaxies stopped producing stars later in life.
Credit: ESO/A. Fujii/Digitized Sky Survey 2/UltraVISTA teamESO