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I read that:-
"Astronomers have been puzzled, however, by a shortage of young supernova remnants in our galaxy. Only half a dozen have been found, as opposed to the more than 30—roughly two a century—predicted to exist"
Are supernova (or remnants) detectable if they are well across the galaxy behind the galactic core? I have often wondered whether we are just not detecting them for that reason?
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