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Dr. Guillem Anglada Escude, Friday, 4-24-15 April 25, 2015

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Dr. Guillem Anglada Escude, Friday, 4-24-15

http://archived.thespaceshow.com/shows/2460-BWB-2015-04-24.mp3

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Guest:  Dr. Guillem Anglada.  Topics, Gilese 581d, exoplanets, detection methods, physics, astronomy and more.  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, https://thespaceshow.wordpress.com.  Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use. We do not permit the commercial use of Space Show programs or any part thereof, nor do we permit editing, YouTube clips, or clips placed on other private channels & websites. Space Show programs can be quoted, but the quote must be cited or referenced using the proper citation format. Contact The Space Show for further information. In addition, please remember that your Amazon purchases can help support The Space Show/OGLF. See www.onegiantleapfoundation.org/amazon.htm.  For those listening to archives using live365.com and rating the programs, please email me as to why you assign a specific rating to the show. This will help me bring better programming to the audience.

 

We welcomed Dr. Guillem Anglada to the show from the UK to speak with us about Gilese 581d, exoplanet detection methods, specifically Doppler spectroscopy, and more.  During our one segment one hour discussion, Dr. Anglada explained to us why Gilese 581d (G 581d) has become a benchmark for the Doppler technique for finding exoplanets.  In explaining this to us, we also defined and talked about the habitable zone and why the Doppler technique works better for nearby stars as lots of light is needed.  We talked about the G system red dwarf or low mass star.  I asked our guest about telescopes and just how big a telescope had to be to see G581d for example.  At this point in the discussion, we began getting a series of email questions from listeners that were technical and superb.  I read them all on air ranging from asking about microlensing to occulters, to questions about our Sun and much more.  I asked Dr. Anglada what Earth would be like were we standing on G 581d and trying to detect Earth.  Do not miss his answer, it might surprise you.  Listeners also asked about the impact of the exoplanet field on students and if it was driving STEM enrollment.  We got two emails from a new country during this show as Michael sent in questions from Slovenia.  In one question, he asked about a free-flying coronagraph that could occult stars for direct imaging, especially for ground based telescopes.  There was more to his question so don’t miss it.  His other question was about detecting Oort cloud objects.  Our emailers asked about the transit method for finding exoplanets and our guest discussed alternative methods as well.  We talked about future exoplanet finding missions similar to Kepler such as TESS and PLATO.  Near the end of the show BJohn in one of his questions asked about the use of radio waves for finding exoplanets. This is a very informative and high level discussion with our guest who we will certainly have back on The Space Show.

 

Please post your comments/questions on The Space Show blog.  You can reach our guest through me or his university’s faculty page.

Dr. Sara Seager, Friday, 1-24-14 January 25, 2014

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Dr. Sara Seager, Friday, 1-24-14

http://archived.thespaceshow.com/shows/2172-BWB-2014-01-24.mp3

Your Amazon Purchases Can Help Support The Space Show/OGLF (www.onegiantleapfoundation.org/amazon.htm)

Guest:  Professor Sara Seager.  Topics:  Exoplanets, searching techniques, ET life & much more.  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, https://thespaceshow.wordpress.com.  Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use. We do not permit the commercial use of Space Show programs or any part thereof, nor do we permit editing, YouTube clips, or clips placed on other private channels & websites. Space Show programs can be quoted, but the quote must be cited or referenced using the proper citation format. Contact The Space Show for further information. In addition, please remember that your Amazon purchases can help support The Space Show/OGLF. See www.onegiantleapfoundation.org/amazon.htm.

We welcomed Professor Sara Seager of MIT to the program to discuss exoplanets and the science behind finding them along with the search for life and Earth-like planets.  For more information, visit her website, http://seagerexoplanets.mit.edu.  In addition, Professor Seager has a free ebook available for download on her website, “Is There Life Out There.”  You can download this ebook at http://seagerexoplanets.mit.edu/ProfSeagerEbook.pdf.  During the first segment of our 1 hour 27 minute discussion, Professor Seager started with a working definition for exoplanets and the techniques used to find exoplanets.  We also talked about planet habitability, the habitable zone, Kepler planets, ground based telescopes, direct imaging, the Gemini Planet Imager, and the potential involvement of amateurs & their telescopes in the search for exoplanets.  Many listener questions came in by email. One focused on SETI which led to an interesting discussion with our guest.  Professor Seager provided us with comparison statistics for various planets and their size and characteristics, and we talked more about the best exoplanet finding methods.  Our guest told us about “ExoplanetSat,” a 3U CubeSat capable of high precision pointing with a goal of detecting small transiting exoplanets orbiting bright, sun-like stars.  We then discussed CubeSat photography & cameras and more about the need for precision pointing.  Professor Seager received several questions about budget and NASA issues, then Doug called in with excellent questions about exoplanets that you do not want to miss.

In the second segment, we talked about Professor Seager’s ebook on her website, “Is There Life Out There,” plus our guest responded to an email question from Nathan about the “Rare Earth” hypothesis.  We then talked about the KST problems and the new mission for the space telescope referred to as K2.  John form Ft. Worth called to ask about conceptual and technological advancement & breakthroughs in the field.  I asked our guest what she thought the field might look like in ten years plus I asked her why rocky planets were important for finding exoplanets.  Charles Pooley called to ask about photometry, LEO, & related issues.  As our program was ending, I asked Professor Seager to share with us some of her media experience and thoughts about the quality of science reporting.

Please post comments/questions on TSS blog.  I will be happy to pass on your emails to her if you send them to me.