Using the Circumgalactic H-alpha Spectrograph (CHαS), astronomers have performed spectroscopic observations of a nearby active galaxy designated Messier 77. They detected a very extended structure of ionized gas around this galaxy. The finding was reported in a research paper published August 22 on the preprint server arXiv and... read full story
"We have performed wide-field, ultra-low surface brightness hydrogen-alpha emission line mapping around NGC 1068 with the newly commissioned Circumgalactic Hα Spectrograph (CHαS),"