Universe Today Podcasts With Fraser Cain

In this week's questions show, I introduce Ona, by request. I explain why I don't think going to space is going to fix the big challenges that humanity faces, and how do astronomers figure out how big a planet is? Talking about existential threats with Phil Torres https://www.youtube.com/watch?v=XKYTrKapyrs 00:00 Meet Ona 02:00 Will going to space fix our evil humanness? 04:40 Sparks under the space shuttle main engine 05:27 How do we know how big a planet is? 07:23 Can we push the Earth outward? 10:03 Why make so many telescopes? 11:50 Will we see less of the Universe in the future? 13:16 Will we have space colonies in my lifetime? 15:50 Is life beyond the scope of our ability to observe? 17:56 What about planets with long orbital periods? 19:57 What would happen if magnetars collided? 21:44 What will the CMB look like in billions of years? 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.