Could there be rouge planets floating in space between us and Alpha Centauri system? Will solar sails be used for propulsion in our lifetime? BONUS question :https://www.patreon.com/universetoday🚀 [Overtime] Even more Q&A:https://www.patreon.com/universetoday00:00 Start00:33 [Visto Tutti] Could there be rogue planets between us and Alpha-Cen? 06:31 [KoiJoiJoe] Is the Chinese project to harvest solar energy in space and beam it to Earth real? 11:26 [Somadove] Will solar sails be used for propulsion in our lifetime?