astronomers-say-our-galaxy-hasnt-seen-a-supernova-in-400-years-why-dont-they-count-the-1987-supernovahttps://www.astronomy.com/science/astronomers-say-our-galaxy-hasnt-seen-a-supernova-in-400-years-why-dont-they-count-the-1987-supernova/Astronomers say our galaxy hasn't seen a supernova in 400 years. Why don't they count the 1987 supernova? | Astronomy.comcategories:Science | tags:Magazinehttps://www.astronomy.com/uploads/2021/09/asy-sk1208_01a_supernova.jpgInStockUSD1.001.00sciencearticleASY2023-05-182008-10-2739517
