Universe Today Podcasts With Fraser Cain

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