Universe Today Podcasts With Fraser Cain

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

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Synopsis

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: ht