Universe Today Podcasts With Fraser Cain

In this week's questions show, I explain why we'll never know which stars have no planets. How we could prevent a catastrophe to Earth, and why aliens might still be a threat to us. Check out more of Dustin Gibson's photographs at: https://www.instagram.com/gibsonpics/ 00:48 How many stars don't have planets? 02:29 Could we prevent a catastrophe? 05:16 No aliens would be a threat to us 07:38 Can I have any name for Patreon? 08:20 Why not put a laser on the solar sail spacecraft 09:40 How can neutrinos go faster than light? 10:45 How do you calculate exposure times for Hubble? 14:32 What would cause stars to collide 17:19 Why don't we track asteroids? 18:55 How do magnetars form? 20:36 How could we destroy the planet? 22:45 Can a brown dwarf become a star? Want to be part of the questions show? Ask a short question on any video on my channel. I gather a bunch up each week, and answer them here. Our Book is out! https://www.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/ Audio Podcast version: