Supermassive black hole jets mysteriously ignite nova explosions, Hubble Telescope finds 

 Hubble Space Telescope observations suggest supermassive black hole jets double the frequency of nova explosions. But how? 

https://cdn.mos.cms.futurecdn.net/Q9GWpcqp6CpyAG6MSScULC.jpg

https://www.space.com/supermassive-black-hole-jets-hubble-telescope-nova-explosions