Rings Around Stars, Laser Space Propulsion, Life on Cold Moons | Q&A 206

How do we determine the velocities of objects in distant space? Can we use a laser a space engine on a spaceship? Can we find stars with rings? Is it possible to see the same star at different stages of its life? All this and more in this week's Q&A.

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00:00 Start
02:21 [Tatooine] Can stars have rings?
07:59 [Coruscant] Can we see stars at different life stages with gravitational lensing?
11:29 [Hoth] Why not launch payloads from orbit?
14:30 [Naboo] What would happen if time stopped?
16:20 [Kamino] Does Elon/Twitter impact spaceflight confidence?
18:28 [Bespin] How can there be life on cold moons?
22:49 [Mustafar] What if a meteor hits the Moon while astronauts are there?
25:58 [Alderaan] Shouldn't ETs be benevolent like Vulcans and not malevolent like Klingons?
27:51 [Dagobah] How do we determine the speeds of objects in space?
30:06 [Yavin] Why go back to the Moon?
32:08 [Mandalore] Do you ever get tired of speculating and not lending your intellect to progress?
34:14 [Geonosis] Wen JWST Deep Field?
35:20 [Corellia] Why is Sag A* disk not aligned with the galaxy?
37:23 [Crait] Will there be a Mars colony this century?
39:43 [Endor] Could we use a laser as an engine on a spaceship?

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