Fast Radio Bursts from Extragalactic Light Sails
extragalactic travel seems to be a really dangerous and difficult prospect. The journey will take millions of years (assuming no FTL travel), and there&#x27;s basically nothing in between. Even if your species is immortal or something, there&#x27;s serious risks. You need to bring everything to need for the journey, including energy, because there aren&#x27;t any stars you can stop at along the way to gather solar energy. You&#x27;d have to be very careful planning things so you don&#x27;t wind up stranded partway.