PARSECS, Light Years, or AU? (Astronomy)

Our Socratica Astronomy series is back! Bookmark the playlist here: ✷ https://socratica.link/Astro_Playlist We also ask you join our STELLAR email list so we can notify you when new videos go live: ✷ https://www.socratica.com/email-groups/astronomy (Don’t rely on the YT algorithm to show you what you’re really interested in!) ✵✵✵✵✵ Units of Distance in Astronomy Light Years, Parsecs, AU (Astronomical Units) and kilometers We’re familiar with kilometers (and miles) as measures of distance here on Earth. But when it comes time to measure distances of heavenly objects, it makes more sense to use the units AU, LY, and PC. That is, Astronomical Units, Light Years, and Parsecs. That’s because space is REALLY big! Today we’ll examine these units that are most commonly used to measure distances in space, and when it makes more sense to use one rather than another. For instance, did you know that astronomical units (AU) are typically used for within our Solar System? But the distance to our nearest star, Proxima Centauri, is so huge that we really do need to jump up to using either Light Years or Parsecs. You'll even hear the terms megaparsec and gigaparsec! ✵✵✵✵✵ CHAPTERS You can jump to chapters in the video here: 0:00 Introduction to AU Astronomical Units 0:33 AU Distances to planets in our Solar System 0:49 Using Light Years (LY) 1:05 LY in km 1:28 Proxima Centauri 1:37 Orion Nebula 1:52 Using Parsecs (PC) 1:57 PC in LY 2:07 Parsec name explanation 2:22 Parallax demonstration 3:23 What is an arc-second 4:15 d = 1/p 5:35 Challenge Question You can check your work on the Challenge Question on our website: https://www.socratica.com/lesson/astronomical-distances-problems ✵✵✵✵✵ THANKS TO OUR SOCRATICA FRIENDS This video was made possible by the generous support of our VIP Patrons on Patreon. What a blessing it is to have support from people who care about education! Let's take a moment to recognize these lovely souls: Alvin Khaled, Carlos Araujo, Charles Southerland, Chris Kunstt, Christopher Kemsley, Colin Negrych, Deeptanshu Malik, Eric Eccleston, Israel Scott Grogin, Jeremy Shimanek, John Krawiec, Justin Fritz, Kavon Johnson, Kevin B, Marcos Silveira, MdeG, Michael Shebanow, Nunya Beezwax, Philip Rice, Rob Neal, Scott Dreblow, Tracy Karin Prell, and Umar Khan. Many thanks go out to @Launch Pad Astronomy ! Liliana and Kimberly attended the annual Launchpad Astronomy Workshop for writers, led by astronomy professors Mike Brotherton and Christian Ready. Read more about our experience here: ✷ https://www.launchpadworkshop.org ✷ https://www.socratica.com/the-socratica-method/launchies Christian generously reviewed this script and offered advice. Be sure to check out his channel “Launchpad Astronomy” where your friendly neighborhood astronomer keeps you up to date on all the latest in the astro world. ✷ https://www.youtube.com/c/ChristianReady/videos ✵✵✵✵✵ SUPPORT SOCRATICA You can support our channel by making purchases using our affiliate links. These are books and other resources we have used ourselves, and can personally recommend. A small percent of your purchase (usually 1-2%) will be shared with Socratica by the vendor. We highly recommend the Astronomy textbook “Universe” by Roger Freedman et al: ✷ 9th Edition http://amzn.to/2so6Ums ✷ 10th Edition http://amzn.to/2tfBjUe ✷ 11th Edition https://amzn.to/3mhxqvv Moon Globe with explorations ✷ https://amzn.to/3me3kZM Celestron 6-inch computerized telescope ✷ https://amzn.to/3mhdysk Our STUDY TIPS BOOK is now available! How To Be a Great Student ✷ e-book: https://amzn.to/2Lh3XSP ✷ Paperback: https://amzn.to/3t5jeH3 Or read for free when you sign up for Kindle Unlimited: ✷ https://amzn.to/3atr8TJ Shop Amazon Used Textbooks - Save up to 90% ✷ http://amzn.to/2pllk4B ✵✵✵✵✵ MORE WAYS TO SUPPORT SOCRATICA JOIN this channel for cute owl badges: ✷ https://bit.ly/SocraticaBadges SUBSCRIBE to Socratica: ✷ http://bit.ly/SocraticaSubscribe SUPPORT Socratica on Patreon: ✷ https://www.patreon.com/socratica DONATE with Paypal: ✷ https://www.paypal.me/socratica GIFT CRYPTO with Bitcoin: ✷ Our address is bc1qda47tgfyk67lxa7yqn8y5m02hjcglghsd5c58n ✵✵✵✵✵ CREDITS Presented by Liliana De Castro Written by Kimberly Hatch Harrison Produced by Kimberly Hatch Harrison & Michael Harrison Picture Credits ESA/Hubble & NASA Proxima Centauri from Hubble Space Telescope https://www.nasa.gov/sites/default/files/styles/1920x1080_autoletterbox/public/potw1343a.jpg?itok=Ceuxv-GP Orion Nebula - Spitzer Space Telescope https://images-assets.nasa.gov/image/PIA08653/PIA08653~orig.jpg NGC 6717 Globular star cluster from Hubble Space Telescope ESA/Hubble and NASA, A. Sarajedini Meditations F8LKFUP3ZHZBPIZR Keeping On SMGDBQIF83RWQWEQ #Astronomy #LightYear #Parsec


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