Episode 545: Q&A 93: When Will The Space Junk Return To Earth? And More...

In this week's questions show, I explain how long it'll take for space junk to burn up in the Earth's atmosphere, would it be possible to put advertising in space, and why panspermia is appealing as a hypothesis.

01:04 When will the space junk return to Earth?
03:14 Why don't we clean up the junk?
06:50 Can we advertise in the night sky?
08:36 Why is pansperimia appealing as a hypothesis?
10:53 Crewed space station dedicated to astronomy?
13:25 Best way to reduce light pollution?
16:08 What factors are important for life?
18:41 Can a star and black hole orbit each other?
20:41 How does time dilation work?
24:46 What will happen if Starship works?
28:49 How do galaxies collide if everything is expanding?
30:10 Why are Saturn's rings fading away?

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 / [email protected]
Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw
Chad Weber - [email protected]