Greater observatories: A midlife crisis for X-ray astronomy Greater observatories: A midlife crisis for X-ray astronomyDOI: info:10.1038/486181av. 486181–182Elvis, Martin. 2012. "Greater observatories: A midlife crisis for X-ray astronomy." Nature, 486 181–182. https://doi.org/10.1038/486181a.More...ID: 112033Type: articleKeywords: SAO