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. 🦄 Support us on Patreon:   / universetoday   Book Club:   / universe-today-book-club   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? 📰 EMAIL NEWSLETTER Read by 60,000 people every Friday. Written by Fraser. No ads. Subscribe Free: https://universetoday.com/newsletter 🎧 PODCASTS Universe Today: https://universetoday.fireside.fm/ Weekly Space Hangout:    / @weeklyspacehangout   Astronomy Cast: http://www.astronomycast.com/ 🤳 OTHER SOCIAL MEDIA Twitter:   / fcain   Twitter:   / universetoday   Facebook:   / universetoday   Instagram:   / universetoday   📩 CONTACT FRASER [email protected] ⚖️ LICENSE Creative Commons Attribution 4.0 International (CC BY 4.0) You are free to use my work for any purpose you like, just mention me as the source and link back to this video.