Weekly Space Hangout - Hipparchus’ Lost Star Catalog with Dr. Victor Gysemberg

https://youtu.be/k7GpdIsuetA Streamed live on Nov 23, 2022. Host: Fraser Cain ( @fcain ) Special Guest: Greek astronomer Hipparchus, who lived in the second century BCE, is considered to be the greatest astronomical observer of his time. Among his achievements are the development of trigonometry, the ability to predict solar eclipses, discovering and measuring the precession of the equinoxes, and, in approximately 135 BCE, the compilation of the first comprehensive star catalogue in the western world. Since that time, scientists have spent centuries searching for Hipparchus' Star Catalogue, but it disappeared and has never been found.   Or has it?   In 2017, researchers used multispectral imaging and computer algorithms to examine an ancient manuscript that had been discovered in a Greek Orthodox monastery in Egypt in 2012. The resulting images not only uncovered astronomy-related writings (e.g., Eratosthenes’ star-origin myths [https://en.wikipedia.org/wiki/Cataste...] and the third-century poem Phaenomena [https://www.britannica.com/topic/Phae...] about the constellations,) but also hidden in the manuscript were star coordinates. Could this manuscript include part of Hipparchus' star catalogue?   Tonight we are airing Fraser's prerecorded interview with Dr. Victor Gysembergh, research professor at the French National Scientific Research Centre. Victor is one of the two experts who examined the manuscript images - tune in to hear all about his conclusions.   Victor Gysembergh is a CNRS research professor at the Centre Léon Robin (Sorbonne Université). He is currently working on an edition of the fragments of Eudoxus of Cnidus, as well as on editions of Claudius Ptolemy’s treatise On the Analemma and his recently discovered treatise on the Meteoroscope.   You can read all about this exciting discovery here: https://news.artnet.com/art-world/med...   You can also read the resulting paper about this find here: https://journals.sagepub.com/doi/epub...   You can learn more about Hipparchus here: https://en.wikipedia.org/wiki/Hipparchus  Regular Guests: Dr. Nick Castle ( @PlanetaryGeoDoc / https://wanderingsci.com/ )  Dr. Paul Byrne ( @ThePlanetaryGuy / https://eps.wustl.edu/people/paul-byrne ) Beth Johnson - SETI Institute ( @SETIInstitute & @planetarypan ) This week's stories: - Artemis 1 goodness! - Webb seeing so much exoplanet atmosphere. - A partial solar eclipse on Mars. - A precise asteroid impact prediction. - Mars rover update!   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://www.redbubble.com/people/CosmoQuestX/shop 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 the Planetary Science Institute. http://www.psi.edu Visit us on the web at 365DaysOfAstronomy.org or email us at [email protected].