In this episode, the team sits down to ponder the question how many exoplanets are there? At first, this might seem like a relatively straightforward question that can be answered by NASA’s Exoplanet Archive, but it becomes more daunting when considering, for example, the biases and limitations of our instruments that affect our ability to even detect and characterise many planets, how we define a ‘planet’, and whether or not we have surveyed enough stars
On this episode we ask the question: Can we ever image the surface of an exoplanet? Once we get all the definitions out of the way, like ‘what do we mean by map?’ and ‘what do we mean by surface?’, we take a deep dive into the realm of instrumentation to discuss the possibilities and limitations of our upcoming and near-future exoplanet imaging technologies. We touch on some of the avenues that astronomers & engineers
In this round-up of the month’s notable exoplanetary exploits, we cover all the headlines including: Proxima c (not) being directly imaged with Sphere – WASP-4b’s accelerating orbit – two new but very different sub-Saturn-mass planets – windspeed measurements on Brown Dwarfs – plus the influence of Gin & Vampires on exoplanets (from a couple of results very early this month). Also this month, check out our chat with Dr Sarah Casewell; and a discussion of
Exocast-43c – On this episode we ask the question: Can we EVER travel to an exoplanet?
Our final bite-size episode for this month features Andrew, Hannah, and Hugh chatting with Dr Stephen Kane, Associate Professor of Planetary Astrophysics in the Departments of Earth and Planetary Sciences and Physics and Astronomy at the University of California, Riverside. Stephen tells us a little about his need to use all exoplanet detection techniques, his love for our hot and cloudy next-door neighbour Venus, and he tries to sneak two planets into our adopted exoplanet list, before settling on one
In Exocast-41b we talk to Dr Erin May about all things from observing to theoretical GCMs, Hugh discusses Strange transit signals, we review #ExoCup2019 and go through the months Exoplanet news.
Hugh chats with his colleague at the University of Bern Dr. Brett Morris about starspots and their effect on exoplanet detection and characterisation, his experience with an astrobiology mission right here on Earth, and he recounts an exciting day in Bern earlier this year. Andrew discusses the labels we apply to the worlds we find, and the gang debates the usefulness of the terms for exoplanet science. And Hannah reads ADS so you don’t have
Exocast-28b: Special guest Daniel Angerhausen, SOFIA, technosignatures, news, HD 209458b
Exocast-27b: special guest Michael Gully-Santiago, K2, Exoplanet meetings, news, HAT-P-11b
In the 26th episode of Exocast: Natasha Batalha joins Hannah for a chat about PandExo (the Exoplanet ETC for HST and JWST) and her work on Martian climate modelling. Hugh discusses all things radial velocity: history, current, and future prospects. Andrew covers all of June’s exoplanet news; And Natasha adds “Hannah’s special planet” HAT-P-26b to our gang of Adopted Planets http://media.blubrry.com/exocast/p/www.exocast.org/wp-content/uploads/2018/07/Exocast-26b_v2.mp3Podcast: Play in new window | DownloadSubscribe: Android | RSS
In the 25th episode of Exocast: Jessica Spake joins us to chat about the first detection of exoplanetary Helium – around the planet Wasp-107b Andrew covers whether alien biology could exist in a Shadow Biosphere here on Earth. Hannah covers all of May’s exoplanet news; And Jess invites an old friend to the exocast adopted planets – 51 Pegasi b, the first exoplanet detected around a sun-like star. http://media.blubrry.com/exocast/p/www.exocast.org/wp-content/uploads/2018/05/exocast-25b_edit1.mp3Podcast: Play in new window | DownloadSubscribe:
Exocast-21b: planet formation, habitability of eccentric planets, news, Kepler-21b
Exocast-15b: biosignatures, TESS, news, Kepler-37b
In the 14th episode of Exocast Hannah takes us back to basics and introduce the composition and chemistry of exoplanet atmospheres. Andrew covers some recent updates from astrobiology, the field of study that aims to figure out if there’s life on any the exoplanets we’ve discovered, or on some of the worlds closer to home. Hugh takes us through the latest in exoplanetary news, including the newest discoveries, investigations, and notable events in exoplanets this month.
In the eleventh episode, Exocast-11b: Hannah covers all the incredible news about the Trappist-1 system, talking us through the discovery of seven new earth-sized worlds around this nearby ultra-cool dwarf. Andrew talks about the philosophy of exoplanets, from the ancients, through the dark ages, and into the modern era. And Hugh sits in at the exocast newsdesk to cover the release of 60,000 HIRES RVs, new transit-hunting surveys MASCARA and BRing, the star HAT-P-2 beating to the rhythm of