Herschel survey in visible light
![](https://cdn.sci.esa.int/documents/33622/35366/1567216233369-Herschel_Reference_Survey_mosaic_SDSS_625.jpg)
Date: 17 March 2014
Satellite: Herschel
Depicts: Collage of galaxies in the Herschel Reference Survey
Copyright: Sloan Digital Sky Survey/L. Cortese (Swinburne University)
Collage of galaxies included in the Herschel Reference Survey as seen at visible wavelengths in images obtained by the Sloan Digital Sky Survey. The colour distribution highlights different stellar ages, with red and blue indicating older and younger stars, respectively.
Last Update: 1 September 2019