# \[Interview+\] Supernova Remnants Should Fade Away. So, Why are Some Flashing?

An episode of [Universe Today Podcast](https://invisiblenetwork.ai/podcast/794058155), 22 Jul 2026, 55 min.

Audio: https://c10.patreonusercontent.com/4/patreon-media/p/post/164553658/57e89b8bb78e46b7934b1a24e7b480db/eyJhIjoxLCJpc19hdWRpbyI6MSwicCI6MX0%3D/1.m4a?token-hash=KErYP4gU_AnDajYCsdLiZeIGYSq3swbUHgsVhstOY4k%3D&token-time=1794182400

👉 More interview HERE: https://www.patreon.com/collection/44300 BONUS PART STARTS AT 34:06 Watch here (with no ads) or on YouTube: https://youtu.be/XWz1mElwO-I Supernova remnants should be stable. All the action is long gone. But newly found supernovae in M87 unexpectedly show signs of rapid change. Why does this happen? Nobody really nows yet. 🟣 Guest: Dr. Roy Kilgard https://rkilgard.faculty.wesleyan.edu/ 📜 NASA's Chandra Finds Unexpected Fireworks in Aftermath of Stellar Explosions https://chandra.si.edu/press/26_releases/press_061526.html • 00:00 Intro • 01:56 Dynamic supernovae • 08:28 What's going on there? • 20:11 How can we resolve this mystery • 22:08 X-ray binaries • 24:24 Demarkation of compact objects • 29:17 Neutron stars becoming black holes • 34:06 Light pollution • 43:53 Current obsessions • 51:25 Final thoughts

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