What's the maximum speed you can get from a gravity assist? Can we have a double gravitational lens? 🦄 Support us on Patreon:https://patreon.com/universetoday📚 Suggest books in the book club:https://www.goodreads.com/group/show/1198440-universe-today-book-club00:00 Start00:25 [Alaris] Can phones survive in space? 13:35 [Belsa] Can there be double gravitational lenses? 40:11 [Jenev] What is the speed limit that can be achieved by sling-shot around planets?