Episode 797: Fusion Rockets, Ditching Heat Shields, Looking Beyond the Edge of the Universe | Q&A 176

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In this week's live Questions and Answers show, I explain how a more powerful rocket could reduce the need of a heat shield, if we could detect objects beyond the edge of the observable Universe through their gravity, and what are the largest objects (or spacecraft) that could hang out at a Lagrange Point?

00:00 Start
00:13 Why do we even need heat shields?
03:12 Could we detect objects beyond the observable Universe through their gravity?
05:42 Can massive objects last at Lagrange Points?
08:03 Will fusion drives enable interstellar travel?
11:35 Why does gas need to be cold to form stars?
13:11 Why do we assume dark energy is accelerating the expansion of the Universe?
17:08 Can Webb look in all directions?
19:01 Could we detect the Earth from 100 light-years away? What about our satellites?
22:24 Is everything still trapped inside the Big Bang?
24:34 How can people support Universe Today?
27:06 Are black holes really dark stars?
28:10 Would geothermal work on Mars?
30:53 How can Webb orbit L2 if nothing's there?
34:24 Can smaller black holes eat bigger black holes?
35:25 When will we stop wanting to colonize Mars?
36:48 Can dark matter be explained by black holes?

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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