[Q&A] Messaging The Aliens, Moving the Earth, Shapes of Coronagraphs

How can we let aliens know we're here? What does a lunar eclipse look like as seen from the Moon? Can we record a supernova in real time? Why aren't coronagraphs just circles? Answering all these questions and more in this week's Q&A show.🦄 Support us on Patreon: https://patreon.com/universetoday📚 Suggest books in the book club:https://www.goodreads.com/group/show/1198440-universe-today-book-club00:00 Start00:37 [Andoria] Can we signal to aliens with green glass? 06:39 [Vulcan] Lunar eclipse seen from the Moon11:24 [Risa] Can we record a supernova appearing in real-time? 16:05 [Aeturen] Why aren't coronagraphs just circles? 20:53 [Vendikar] How do astronomers determine distances to other galaxies?25:02 [Remus] Who was my favourite interview? 28:01 [Janus] How do astronomers determine the age of stars? 31:11 [Cait] Can we move Earth by the time the Sun will die? 34:31 [Betazed] Why does the Moon look bigger and yellow sometimes? 📺 VIDEO VERSIONhttps://youtu.be/mz-DcU2VaAs📰 EMAIL NEWSLETTERRead by 60,000 people every Friday. Written by Fraser. No ads.Subscribe. It's FREE: https://universetoday.com/newsletter🎧 PODCASTSUniverse Today: https://universetoday.fireside.fm/Astronomy Cast: http://www.astronomycast.com/🤳 OTHER SOCIAL MEDIATwitter: https://twitter.com/fcainTwitter: https://twitter.com/universetodayFacebook: https://facebook.com/universetodayInstagram: https://instagram.com/universetoday📩 CONTACT [email protected]⚖️ LICENSECreative Commons Attribution 4.0 International (CC BY 4.0)Support Universe Today Podcast