Weekly Space Hangout - Guest: Dr. Mark Showalter, SETI Institute

https://www.youtube.com/watch?v=BXqXFMRIvTM Streamed live May 1, 2019. Host: Fraser Cain ( @fcain ) Special Guest: Dr. Mark Showalter, senior research scientist at the SETI Institute ( https://www.seti.org/our-scientists/mark-showalter & https://www.seti.org/ ) Mark Showalter is a Senior Research Scientist and Fellow of the Institute. His research focuses on the dynamics of rings and small moons in the Solar System. Known for his persistence in planetary image analysis, Mark's early work with Voyager data led to the discoveries of Jupiter's faint, outer "gossamer" rings and Saturn's tiny ring-moon, Pan. Starting in 2003, his work with the Hubble Space Telescope led to the discoveries of "Mab" and "Cupid", small moons of Uranus now named after characters from Shakespeare's plays. His work also revealed two faint outer rings of dust encircling the planet. In 2011, Mark initiated a Hubble observing program focused on Pluto, which led to the discoveries of two tiny moons. Their names, "Kerberos" and "Styx", were selected through an international naming campaign. Mark also discovered the 14th known moon of Neptune. He is a co-investigator on NASA's Cassini mission to Saturn and its New Horizons mission to Pluto and beyond. Regular Guests: Dr. Pamela Gay ( https://cosmoquest.org/x/ / @starstryder ) Dr. Kimberly Cartier ( http://KimberlyCartier.org & @AstroKimCartier ) This week's stories: - Water on Itokowa! - The Hubble constant is still a problem. - LIGO is living large. - An icy scar on TItan. - Fraser gets in the last word. Which is "so"...   Donate! (Streamlabs link) https://streamlabs.com/cosmoquestx Buy stuff from our Redbubble https://www.redbubble.com/people/cosm... Help us find sponsors by sharing our program and fundraising efforts through your networks. Become a Patreon of Astronomy Cast https://www.patreon.com/astronomycast Sponsor 365 Days of Astronomy http://bit.ly/sponsor365DoA A combination of the above!   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank you! ------------------------------------ Do go visit http://astrogear.spreadshirt.com/ for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just click!) The 365 Days of Astronomy Podcast is produced by Astrosphere New Media. http://www.astrosphere.org/ Visit us on the web at 365DaysOfAstronomy.org or email us at [email protected].