Weekly Space Hangout Weekly Space Hangout Journalist Team

Join us this week for our first News Roundup of the New Year, which is also the final episode of the Weekly Space Hangout! Thank you to everyone who made this show possible over the years and who helped bring science to the community!
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The Weekly Space Hangout is a production of CosmoQuest. Want to support CosmoQuest? Here are some specific ways you can help:
Subscribe FREE to our YouTube channel at https://www.youtube.com/c/cosmoquest Subscribe to our podcasts Astronomy Cast and Daily Space where ever you get your podcasts! Watch our streams over on Twitch at https://www.twitch.tv/cosmoquestx – follow and subscribe! Become a Patreon of CosmoQuest https://www.patreon.com/cosmoquestx Become a Patreon of Astronomy Cast https://www.patreon.com/astronomycast Buy stuff from our Redbubble https://www.redbubble.com/people/cosmoquestx Join our Discord server for CosmoQuest - https://discord.gg/X8rw4vv Join the Weekly Space Hangout Crew! - http://www.wshcrew.space/ Don't forget to like and subscribe! Plus we love being shared out to new people, so tweet, comment, review us... all the free things you can do to help bring science into people's lives.

Historically, scientists using spectrographic analysis to study exoplanet atmospheres have considered oxygen and methane as two key biosignatures when identifying "life-friendly" planets. But could nitrous oxide (N2O) — aka "Laughing Gas" — also be a reliable biosignature? A recent paper published in the October, 2022, Astrophysical Journal explains why N2O can — and should — be included as a biosignature gas. Tonight we are pleased to welcome the paper's lead author, Dr. Eddie Schwieterman, astrobiologist at UC Riverside, to discuss why N2O is an indicator of life.
Dr. Eddie Schwieterman is an Assistant Professor of Astrobiology in the Department of Earth and Planetary Sciences at the University of California, Riverside. He earned his undergraduate degrees in physics and astrophysics from the Florida Institute of Technology and his PhD in astronomy and astrobiology from the University of Washington in Seattle.
Dr. Schwieterman studies the climate, atmospheric chemistry, geochemical evolution, and spectral appearance of terrestrial (rocky) planets. His research specifically focuses on the habitability and potential biosignatures of exoplanets.
To learn more about Eddie's research visit his website (www.eddieschwieterman.com) and follow him on Twitter: @nogreenstars.
You can also read more about nitrous oxide as biosignature in the following SciNews article: Nitrous Oxide Could Help Detect Extraterrestrial Life on Exo-Earths.
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The Weekly Space Hangout is a production of CosmoQuest. Want to support CosmoQuest? Here are some specific ways you can help:
Subscribe FREE to our YouTube channel at https://www.youtube.com/c/cosmoquest Subscribe to our podcasts Astronomy Cast and Daily Space where ever you get your podcasts! Watch our streams over on Twitch at https://www.twitch.tv/cosmoquestx – follow and subscribe! Become a Patreon of CosmoQuest https://www.patreon.com/cosmoquestx Become a Patreon of Astronomy Cast https://www.patreon.com/astronomycast Buy stuff from our Redbubble https://www.redbubble.com/people/cosmoquestx Join our Discord server for CosmoQuest - https://discord.gg/X8rw4vv Join the Weekly Space Hangout Crew! - http://www.wshcrew.space/ Don't forget to like and subscribe! Plus we love being shared out to new people, so tweet, comment, review us... all the free things you can do to help bring science into people's lives.

Viewers who watched/listened to our November 16, 2022, episode may remember that Dr. Leah Jenks told us about high-energy neutrino emissions from NGC 1068 (Messier 77) that were detected by IceCube. This week we are pleased to welcome Dr. Francis Halzen, Principal Investigator for IceCube, who will discuss the significance of these detections in understanding how active galaxies "work," and potentially ushering in the age of Neutrino Astronomy.
With funding from the National Science Foundation the IceCube project at the South Pole melted eighty-six holes over 1.5 miles deep in the Antarctic icecap to construct an enormous astronomical observatory. The experiment discovered a flux of neutrinos reaching us from the cosmos, with energies more than a million times those of neutrinos produced at accelerator laboratories. These cosmic neutrinos are astronomical messengers coming from some of the most violent processes in the universe and from the biggest explosions since the Big Bang. We will discuss the IceCube telescope and highlight the recent discoveries that some high-energy neutrinos — and cosmic rays — originate from sources powered by rotating supermassive black holes.
Francis Halzen is a Vilas and Gregory Breit Distinguished Professor of Physics at the University of Wisconsin–Madison.
Born in Belgium, Halzen received his Master’s and PhD degrees from the KUL Leuven, Belgium, and has been on the physics faculty at UW–Madison since 1972; in 2021, Halzen was named a Vilas Research Professor, one of the university’s most prestigious honors. He has been a fellow of the American Physical Society since 1994, and is the recipient of numerous awards, including the 2014 "Smithsonian" American Ingenuity Award, the 2015 Balzan Prize, a 2018 Bruno Pontecorvo Prize, the 2019 IUPAP Yodh Prize, the 2021 Bruno Rossi Prize of the American Astronomical Society, the 2021 Homi Bhabha Award, and honorary doctorates at several universities.
Halzen is the Principal Investigator of IceCube, a cubic-kilometer neutrino telescope buried in the Antarctic ice at the South Pole. IceCube’s first observations of high-energy cosmic neutrinos garnered the 2013 "Physics World" Breakthrough of the Year Award. In September 2017, IceCube detected a high-energy neutrino from the direction of a blazar called TXS 0506+056. This was the first-ever evidence of a source of high-energy cosmic rays, whose origins have been notoriously difficult to pinpoint since they were discovered over one hundred years ago.
Also a skilled science communicator, Halzen travels widely, giving about 20 or more invited talks per year at conferences, workshops, and colloquia. He also gives regular public talks to local and national groups and interviews for television and radio. Halzen is the co-author of "Quarks and Leptons", a classic textbook on modern particle physics that continues to be used extensively throughout college campuses today. He has a large number of publications to his credit and has written or edited several other books. His essay “Antarctic Dreams,” about the early days of AMANDA, IceCube’s precursor, was featured in "The Best American Science Writing 2000".
To stay up-to-date with IceCube, visit the IceCube website and follow them on Twitter (@uw_icecube), Instagram (@icecube_neutrino), and Facebook (@icecubeneutrino).
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The Weekly Space Hangout is a production of CosmoQuest. Want to support CosmoQuest? Here are some specific ways you can help:
Subscribe FREE to our YouTube channel at https://www.youtube.com/c/cosmoquest Subscribe to our podcasts Astronomy Cast and Daily Space where ever you get your podcasts! Watch our streams over on Twitch at https://www.twitch.tv/cosmoquestx – follow and subscribe! Become a Patreon of CosmoQuest https://www.patreon.com/cosmoquestx Become a Patreon of Astronomy Cast https://www.patreon.com/astronomycast Buy stuff from our Redbubble https://www.redbubble.com/

During our November 16th show, Carolyn Collins Petersen introduced us to the hourglass/butterfly of L1527, an image captured by JWST using its onboard NIRCam. (You can read the original story here. This week we are joined by Dr. Karl Stapelfeldt, Chief Scientist for NASA's Exoplanet Exploration Program at JPL who will help us understand the science behind this amazing structure.
Karl earned a B.S.E. in Aerospace Engineering and Engineering Physics at Princeton University, and a Ph.D. in Astrophysics at Caltech. His career at NASA includes positions at both the Jet Propulsion Laboratory and most recently at the Goddard Space Flight Center, where he has served as the Chief of Goddard's Exoplanets and Stellar Astrophysics Laboratory since 2011.
Karl’s NASA science contributions include project science roles for the Hubble and Spitzer Space Telescopes and science observations using the Herschel Space Observatory. He served as chair of the Exoplanet-Coronagraph Probe-Scale Science and Technology Definition Team, and as a member of the Astrophysics Subcommittee of the NASA Advisory Council.
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The Weekly Space Hangout is a production of CosmoQuest. Want to support CosmoQuest? Here are some specific ways you can help:
Subscribe FREE to our YouTube channel at https://www.youtube.com/c/cosmoquest Subscribe to our podcasts Astronomy Cast and Daily Space where ever you get your podcasts! Watch our streams over on Twitch at https://www.twitch.tv/cosmoquestx – follow and subscribe! Become a Patreon of CosmoQuest https://www.patreon.com/cosmoquestx Become a Patreon of Astronomy Cast https://www.patreon.com/astronomycast Buy stuff from our Redbubble https://www.redbubble.com/people/cosmoquestx Join our Discord server for CosmoQuest - https://discord.gg/X8rw4vv Join the Weekly Space Hangout Crew! - http://www.wshcrew.space/ Don't forget to like and subscribe! Plus we love being shared out to new people, so tweet, comment, review us... all the free things you can do to help bring science into people's lives.

It's time for another News Roundup ! Buckle up for another hour of news!!
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The Weekly Space Hangout is a production of CosmoQuest. Want to support CosmoQuest? Here are some specific ways you can help:
Subscribe FREE to our YouTube channel at https://www.youtube.com/c/cosmoquest Subscribe to our podcasts Astronomy Cast and Daily Space where ever you get your podcasts! Watch our streams over on Twitch at https://www.twitch.tv/cosmoquestx – follow and subscribe! Become a Patreon of CosmoQuest https://www.patreon.com/cosmoquestx Become a Patreon of Astronomy Cast https://www.patreon.com/astronomycast Buy stuff from our Redbubble https://www.redbubble.com/people/cosmoquestx Join our Discord server for CosmoQuest - https://discord.gg/X8rw4vv Join the Weekly Space Hangout Crew! - http://www.wshcrew.space/ Don't forget to like and subscribe! Plus we love being shared out to new people, so tweet, comment, review us... all the free things you can do to help bring science into people's lives.
 

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 and the third-century poem Phaenomena 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/medieval-parchment-worlds-oldest-star-map-2195744
You can also read the resulting paper about this find here: https://journals.sagepub.com/doi/epub/10.1177/00218286221128289
You can learn more about Hipparchus here: https://en.wikipedia.org/wiki/Hipparchus
Image credit: Heritage Daily/Peter Mallik - (Adapted)
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The Weekly Space Hangout is a production of CosmoQuest. Want to support CosmoQuest? Here are some specific ways you can help:
Subscribe FREE to our YouTube channel at https://www.youtube.com/c/cosmoquest Subscribe to our podcasts Astronomy Cast and Daily Space where ever you get your podcasts! Watch our streams over on Twitch at https://www.twitch.tv/cosmoquestx – follow and subscribe! Become a Patreon of CosmoQuest https://www.patreon.com/cosmoquestx Become a Patreon of Astronomy Cast https://www.patreon.com/astronomycast Buy stuff from our Redbubble https://www.redbubble.com/people/cosmoquestx Join our Discord server for CosmoQuest - https://discord.gg/X8rw4vv Join the Weekly Space Hangout Crew! - http://www.wshcrew.space/ Don't forget to like and subscribe! Plus we love being shared out to new people, so tweet, comment, review us... all the free things you can do to help bring science into people's lives.