Universe Today Podcasts With Fraser Cain

In this week's questions show, I explain why I don't think we always need to be realistic, if galaxies in the local group are bound together gravitationally, and what we should call Earth-moving equipment on Mars. 00:20 Be realistic. 04:24 Are galaxies in the local group bound? 05:56 Will gravitational waves give us advanced notice of collisions? 08:36 Will we ever be able to live outside on Mars? 10:16 Are we going to ruin Mars too? 12:42 Mars-moving equipment? 14:07 Could the Moon have an atmosphere? 15:51 Liquid water on the surface of Mars 16:49 Is there a business case for Mars? 19:17 What about nitrogen? 21:21 What will need to come from Earth? 23:06 Are there planets with less gravity than Earth? 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: ITunes: https://itunes.apple.com/us/podcast/universe-