With radio astronomy, we study astronomical phenomena that are often invisible or hidden in other portions of the electromagnetic spectrum. (public.nrao.edu)
After some escaped and defied an aggressive eradication effort, he moved to France, where his main legacy was illustrations of astronomical phenomena like eclipses. (dotearth.blogs.nytimes.com)
By the early 1960s, new astronomical phenomena demanded explanations that Newtonian physics could not provide, and general relativity was poised for its renaissance. (sciencenews.org)