keplers-supernova-turns-400https://www.astronomy.com/tags/news/page/672/News | Page 672 of 683 | Astronomy.comBrowse all the latest astronomy and space news on planets, stars, galaxies, cosmology, observing events, space missions, and more.https://www.astronomy.com/wp-content/uploads/sites/2/2021/09/kepler_xray_2_500.jpg?fit=500%2C442InStockUSD1.001.00starsarticleASY2023-05-182004-10-1936263