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Brent Sherwood, Monday, 8-3-15 August 4, 2015

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Brent Sherwood, Monday, 8-3-15

http://archived.thespaceshow.com/shows/2519-BWB-2015-08-03.mp3

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Guest: Brent Sherwood. Topics: Space Solar Power (SSP), climate change, SSP demos, SSP economics. 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 Brent Sherwood back to the show to discuss the rational, potential, and economics for the use of space solar power (SSP). During the first segment of our 1 hour 27 minute discussion, Brent first introduced us to Dr. David MacKay from Cambridge University who in 2009 was appointed Chief Scientific Advisor to the Department of Energy and Climate Change. Brent talked about Dr. MacKay’s book during our discussion, “Sustainable Energy-Without The Hot Air” which is available for free on the internet. You should follow along in the book with Brent’s discussion, especially in the first segment, as our guest referred to pages and visuals frequently. Check it out at http://withouthotair.com. Most of the first segment was spent using information from Professor MacKay’s book to explain the current energy and climate situation on Earth and to justifying moving away from petroleum, eventually to SSP. Brent talked about CO2, energy disruption, the transition to something other than fossil fuels, and how to develop SSP. Dr. MacKay used modeling for the UK which Brent referenced, especially from page 215 with the UK map. Brent then talked economics, again referring to the work by Dr. MacKay suggesting an SSP system costing $1.4 trillion! Spread out over a number of years, that price was not much different from what is spent on several government departments and policies, including NASA at this time. Brent listed several examples of this so don’t miss this discussion. Brent then suggested the least path of disruption would focus on the key which would have to be electricity. This took us to our next topic which addressed how to generate the amount of electricity needed, including his identifying several newer technologies that could lower some industry costs. He talked about some of the main challenges including transportation, storage, transmission, & operations. Later in the segment, Brent delved into the cost per kWh for electricity. Marshal called to talk about key new technologies including advancements in related and applicable photo voltaics and more.

 

In the much shorter second segment, Brent talked about macro engineering projects and huge platforms in GEO space. He said that such SSP GEO platforms would be around 7,000 sq. km. or three times the size of the paved U.S. national highway surface. Brent then addressed why none of this ever happens and he pointed to this not being a purpose of NASA as an example. To counter this, he advocated for a serious demo project, even suggesting the use of the ISS for the demo. Our guest talked about the challenge in attracting private capital to this because it is so futuristic right now. However, private capital has flowed to the futuristic industry of asteroid mining. We both asked why to one and not to the other? The last email question of the day was from Carol who pointed out that government policy to regulate coal and CO2 over 30 years is off point. Instead, government policy should produce a serious demo project that confirms the technology and the potential market, then let the markets and industry self-regulate and invest for the future.

 

Please post your comments/questions on TSS blog above. Brent can be reached through me if you want to contact him.

Dr. Marc Rayman, Monday, 1-26-15 January 27, 2015

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Dr. Marc Rayman, Monday, 1-26-15

http://archived.thespaceshow.com/shows/2401-BWB-2015-01-26.mp3

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Guest:  Dr. Marc Rayman.  Topics:  As the Dawn Mission Director, Dr. Rayman talked about Vesta, Ceres, ion propulsion & much more.  Please direct all comments & questions regarding Space Show programs/guest(s) to the Space Show blog, https://thespaceshow.wordpress.com.  Comments & questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright & 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 http://www.onegiantleapfoundation.org/amazon.htm.  For those listening to archives using live365.com & 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. Marc Rayman to the program to discuss the Dawn Mission to both Vesta & Ceres.  To find out more about Dawn, visit http://dawn.jpl.nasa.gov.  Also check out Dr. Rayman’s blog The Dawn Journal @ http://dawn.jpl.nasa.gov/mission/journal.asp.   Visit the DS1 site & archives by Dr. Rayman @ http://nmp.jpl.nasa.gov/ds1.   During the first segment of our 91 minute program, Dr. Rayman introduced us to the Dawn mission which first went to Vesta & is now closing in on its second destination, Ceres. We talked about the mission being specifically chosen to visit both Vesta & Ceres & that Vesta data is still undergoing analysis.  Dr. Rayman described Vesta’s Rheasilvia Crater 300 miles in diameter formed by an impact about one billion years ago.  We also talked about Vesta meteorites on Earth.  Dwayne called regarding competing theories about Ceres, planets having changed positions at one time, & Dawn mission limitations.  Perry wanted to know what information the team most wanted to get from Ceres. Dr. Rayman said they wanted to know basics such as what it looks like, what it was made of, ice, etc.  Other listeners wanted to know about Ceres compared to Mars access.  Here, Dr. Rayman had much to say as the subject came up again in the second segment.  Doug wanted to know about the large bright spot on Ceres plus other questions.

 

In the second segment, Dr. Rayman told us about his Dawn Journal (blog) per the above URL.  I asked our guest if he thought of Dawn & other science missions as competitive with human spaceflight missions.  Don’t miss his reply as I believe it was very special. BJohn sent several emails asking for Dr. Rayman’s favorite targets, especially for future missions. He also asked about using nuclear power rather than solar.  Our guest described the solar arrays & why solar was chosen for Dawn.  Ion propulsion came up & was a major discussion topic for the balance of our program.  Dr. Rayman described how ion propulsion worked, why it used a slow but steady acceleration, & its advantages over chemical propulsion.  Matt asked about RTG development for future missions .  Doug sent us another question based on the low Ceres gravity & landing on Ceres to pre-position supplies in advance of a crew.  Our guest pointed out it was far more complicated than Doug implied given that the Ceres orbit was tipped more than 10 degrees from the ecliptic.  Make sure you hear this explanation.  Among the many questions Matt asked, he wanted to know about the German component of the Dawn mission.  As we approached the end of our show, Dr. Rayman gave us a preview of what to expect as we get very close to Ceres, gradually getting as low as Earth & ISS.

 

Please post comments/questions on TSS blog above.  The guest, callers, & those sending emails can be reached through me.

Chris Carberry, Sunday, 1-4-15 January 5, 2015

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Chris Carberry, Sunday, 1-4-15

http://archived.thespaceshow.com/shows/2386-BWB-2015-01-04.mp3

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Guest:  Chris Carberry.  Topics:  Human spaceflight to Mars, Exploremars.org, Mars political advocacy.  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 http://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.  Please note that in the second segment there were two very noisy cell phone calls and we apologize for that. I believe the noise was outdoor wind noise at the callers location.

We welcomed back Chris Carberry, Executive Director of Explore Mars, to outline for us their Mars 2015 plans along with proposed political advocacy with the new Congress and upcoming 2016 presidential election.  In the first segment of our 96 minute discussion, Chris mentioned some of the highlight planned for Explore Mars for 2015 including their H2M Conference at GWU from May 5-7 plus he updated us on the ExoLance and their time capsule projects.  We talked about the political work needed and what Explore Mars was doing regarding this with the incoming congressional members and in preparing for the 2016 presidential race.  I asked Chris to tell how human spaceflight to Mars is presented to congressional members for the most impact and what the biggest objections were which he said focused on the budget.  He also suggested there was lots of political interest in human spaceflight to Mars.  Later we talked about Mars or the Moon, competing for funding and for priority status.  Marshall called with questions about needed energy for a human venture to Mars, focusing on either solar power or nuclear power.  The nuclear power part set up a more extensive discussion.  Chris responded to several emails about lunar water and should it be the Moon or Mars.  He was also asked about depots and their possible support of a humans to Mars mission.

In the second segment, Kirk called in for updates on ExoLance and he asked about a sustainable one way mission to Mars, particularly if public money was used for the mission. Chris thought we were far off from a publicly funded one way Martian mission.  Later, Chris talked about increased interest and talk about going to Mars and he mentioned several companies have plans for a humans to Mars mission.  Orion and SLS came up as well.  A 20 year time line was suggested for the Mars mission.  Toward the end of the discussion, Chris said their 2015 agenda was to continue focusing on building the Mars coalition, to start briefing presidential candidates in advance of the 2016 election, plus working with the new congress.  Toward the end of the show, Chris was asked about going to the moons of Mars instead of Mars.  Tim, our last caller, wanted to know about Red Dragon.

Please post your comments/questions on TSS blog above.  You can contact Chris through his website or me.