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.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/
Audio Podcast version:
ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2
RSS: https://www.universetoday.com/audio
What Fraser's Watching Playlist:
https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G
Weekly email newsletter:
https://www.universetoday.com/newsletter
Weekly Space Hangout:
https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/
Astronomy Cast:
https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSg
Support us at: http://www.patreon.com/universetoday
More stories at: http://www.universetoday.com/
Twitch: https://twitch.tv/fcain
Follow us on Twitter: @universetoday
Like us on Facebook: https://www.facebook.com/universetoday
Instagram - https://instagram.com/universetoday
Team: Fraser Cain - @fcain / frasercain@gmail.com
Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw
Chad Weber - weber.chad@gmail.com