Extending the Sun's Life, Moving the Earth Around, Diving Into Uranus' Atmosphere | Q&A 368

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How can we theoretically extend the lifespan of the Sun? What would be the best way to change the orbit of the Earth? Would we ever dive into Uranus? And in Q&A+, would Planet 9 even be categorised as a planet, if it's ever found?

00:00 Start
00:27 [RobH] Do we know the real distance to Polaris?
04:15 [Dad_a_Monk] How can we extend the Sun's life?
07:33 [me] Are mega-constellations making Earth orbit dangerously unstable?
12:11 [Dillon Callihan] How close do other stars come to us?
13:18 [AllanWorks] How can we possibly move a planet?
14:16 [Stratton Henson] How do asteroids collide?
15:56 [Sorak311] Will we ever penetrate Uranus' atmosphere?

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