Universe Today Podcasts With Fraser Cain

In this week's live questions and answer show, I explain how astronomers measure the distance to gravitational wave events, how clean are spacecraft sent to Mars, and would it be possible to have a sample return mission from Titan? https://www.universetoday.com/150507/a-titan-mission-could-refuel-on-site-and-return-a-sample-to-earth/ 00:00 Start 00:25 How do we calculate the distance of gravitational waves? 03:36 Have Mars spacecraft been sterilized? 05:54 Is a sample return mission possible from Titan? 09:11 How fast would time go if there was no gravity? 11:01 Could a tiny vehicle fly autonomously around the ISS? 12:18 Is NASA planning to impact an asteroid? 14:06 Could space missions be build cheaper? 16:26 What science experiments could be done on a Moon base? 18:50 Will there still be time at the end of the Universe? 20:25 Would a rogue planet catch us off guard? 22:15 Could landers build their own rovers? 24:23 How do launch platforms deal with the rocket exhaust. 25:23 Which solution to the Fermi Parad