[Q&A] Rings Around Stars, Laser Space Propulsion, Life on Cold Moons

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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