Episode 677

Q&A 125 Can Stars Orbit So Close They're Touching? And More...

00:00:00
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00:33:13

July 24th, 2020

33 mins 13 secs

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About this Episode

In this week's questions show, I explain how it's possible for stars to orbit so closely they're actually touching. What are the limits to gravitational slingshots, and how astronomers know where to point their telescopes in the Universe.

00:00 Start
00:44 Can stars touch?
02:39 What is the maximum slingshot speed?
05:32 How do astronomers know where to look?
08:27 Could a planet orbit backwards?
10:56 Will nations allow deadly space lasers?
13:06 What if a black hole stopped rotating?
15:06 How would you control a warp drive?
17:32 Is Planet 9 a captured rogue planet?
21:36 Does this mean there are new physics?
25:08 How common are supernovae that don't leave a remnant?
27:14 Why would red dwarf planets be tidally locked?
28:54 How do space agencies decide to launch missions?

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.

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Team: Fraser Cain - @fcain / frasercain@gmail.com
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