Musical black holes play a perfect fifth for today's #MultimediaMonday. In the @LIGO/Virgo signal GW190814 this overtone was observed.
🎞️ https://www.youtube.com/watch?v=p4xHz-If6kw
📰 https://www.aei.mpg.de/267070/a-black-hole-with-a-puzzling-companion