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Dr. Alan Stern, Sunday, 8-24-14 August 25, 2014

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Dr. Alan Stern, Sunday, 8-24-14

http://archived.thespaceshow.com/shows/2302-BWB-2014-08-24.mp3

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Guest:  Dr. Alan Stern.  Topics:  New Horizons to Pluto, Uwingu Mars programs.  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, http://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.

We welcomed Dr. Alan Stern back to the program to discuss New Horizons which is on target for its summer rendezvous with Pluto and new Uwingu projects relating to Mars (www.uwingu.com).  During our hour long program, Dr. Stern started with New Horizons and he mentioned the 10 AM PDT, 1 PM EDT NASA press conference today regarding New Horizons passing Neptune’s orbit plus it being the 25th anniversary of Voyager passing the Neptune system.  The press conference is at http://www.space.com/17933-nasa-television-webcasts-live-space-tv.html but if you miss it, I’m confident it will be archived.  Alan reported that New Horizons was in good health, we talked about the course corrections it has made along its trip to Pluto, plus special events planned for its arrival in the Pluto system.  Other topics included the Kuiper Belt and Ort Cloud, dwarf planets and just how many planets are in our solar system per a question asked by a listener regarding his son’s science class.  BJohn asked questions about the Gaia telescope and comparisons of New Horizons to Dawn and the Rosetta mission.  Another listener asked about the New Horizons team and its costs so far.  We talked about the need for advanced propulsion and what missions would be most suited for it.  Doug sent in an email regarding Pluto, Ceres, and the start of a new era of exploration.  Lots of comments and questions about Pluto being a planet as Alan referred to Pluto as a planet.  Dr. Stern did go over the differences and similarities with Rosetta, New Horizons and the Dawn Mission and he said the Gaia telescope could not do the imaging Bjorn asked about but that Earth-based telescopes could do a good job in some circumstances s could Hubble.  At the halfway point, we switched over to talking about Uwingu and their latest Mars project (see http://uwingu.com/beam-me-to-mars).  I mentioned on air about a Space Show contest which would award the winner a message to Mars so if you have ideas for such a contest, email them to me please.  I plan on sending a Space Show message to Mars and will post it on the blog.  Alan also talked about the program naming Mars craters which will appear on their Mars map which is planned to go to Mars on the Mars One robotic mission in a few years.  Before the show ended, a listener asked Alan about the Next-Generation Suborbital Researchers Conference.

Please post your comments/questions on TSS blog.

John Batchelor Hotel Mars, Wednesday, 2-5-14 February 6, 2014

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John Batchelor Hotel Mars, Wednesday, 2-5-14

http://archived.thespaceshow.com/shows/2181-BWB-2014-02-05.mp3

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Guests: John Batchelor, Dr. David Grinspoon, Dr. David Livingston.  Topics:  Ceres and water, asteroids, Vesta & more. You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, http://thespaceshow.wordpress.com. Comments, questions, and any discussion must be relevant and applicable to Space Show programming. Written Transcripts of Space Show programs are not permitted without prior written consent from The Space Show (even if for personal use) & are a violation of the Space Show copyright. We do not permit the commercial use of any Space Show program or part thereof, nor do we permit Space Show programs to be edited, placed on YouTube, or other private channels & websites. Space Show programs can be quoted in news articles, papers, academic & research work but must be cited or referenced in the proper citation format. Contact Dr. Livingston for questions about our copyright and trademark policies which we do enforce.  This program is archived on The Space Show website, podcasting, and blog sites with permission from John Batchelor. Please visit the John Batchelor Show website for more information about this fine program, www.johnbatchelorshow.com.  Remember, your Amazon Purchases Can Help Support The Space Show/OGLF (www.onegiantleapfoundation.org/amazon.htm).

We welcomed Dr. David Grinspoon to discuss with John Batchelor and myself the recent discovery of the water spout on Ceres, the water to Earth theories, asteroids and comets for water.  We then shifted to Mars and the news of a new crater discovery, plus Curiosity climbing a 3 foot sand dune and more.

Please post any comments/questions you might have on The Space Show blog.  You can contact any of  us through drspace@thespaceshow.com.

 

John Batchelor Hotel Mars, Wednesday, 1-29-14 January 30, 2014

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John Batchelor Hotel Mars, Wednesday, 1-29-14

http://archived.thespaceshow.com/shows/2176-BWB-2014-01-29.mp3

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Guests: John Batchelor, Dr. Humberto Campins, Dr. David Livingston.  Topics:  Ceres and water, asteroids, Vesta & more. You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, http://thespaceshow.wordpress.com. Comments, questions, and any discussion must be relevant and applicable to Space Show programming. Written Transcripts of Space Show programs are not permitted without prior written consent from The Space Show (even if for personal use) & are a violation of the Space Show copyright. We do not permit the commercial use of any Space Show program or part thereof, nor do we permit Space Show programs to be edited, placed on YouTube, or other private channels & websites. Space Show programs can be quoted in news articles, papers, academic & research work but must be cited or referenced in the proper citation format. Contact Dr. Livingston for questions about our copyright and trademark policies which we do enforce.  This program is archived on The Space Show website, podcasting, and blog sites with permission from John Batchelor. Please visit the John Batchelor Show website for more information about this fine program, www.johnbatchelorshow.com.  Remember, your Amazon Purchases Can Help Support The Space Show/OGLF (www.onegiantleapfoundation.org/amazon.htm).  

We welcomed Dr. Humberto Campins to discuss with John Batchelor and myself the recent discover of the dwarf planet Ceres water spout spewing 13 pounds of water per second into space.  Dr. Campins talked about the possible two sources of water for Ceres, what it means and why it is such an important discovery.  We also talked about Vesta and the Dawn Mission as well as the theory that Earth water came from the asteroids.  Ceres helps to validate that theory.  This is a fascinating discussion about asteroids, water, and finding out more about our early start and existence.

Please post any comments/questions you might have on The Space Show blog.  You can contact any of  us through drspace@thespaceshow.com

 

Dr. David Lawrence, Friday, 12-28-12 December 29, 2012

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Dr. David Lawrence, Friday, 12-28-12

http://archived.thespaceshow.com/shows/1919-BWB-2012-12-28.mp3

Guest:  Dr. David Lawrence.  Topic:  The planet Mercury & the NASA Messenger Mission.  Please direct all comments & questions regarding Space Show programs/guest(s) to the Space Show blog, http://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.   We welcomed Dr. David Lawrence to the program to discuss the planet Mercury & the NASA Messenger Mission’s latest finding.  For more information, visit the Messenger websites, http://www.nasa.gov/mission_pages/messenger/main/index.html & http://messenger.jhuapl.edu.  We started our discussion by describing the Mercury & the Messenger mission.  For example, it took over six years to get to Mercury because of the difficulty in slowing the spacecraft down given the close proximity to the sun.  Dr. Lawrence explained this process to us & the Venus, Mercury, & Earth flyby program used by the spacecraft to orbit around Mercury.  We talked about the spacecraft health, the instruments on board & the problem with the gamma ray spectrometer which worked for about 9,000 hours on an expected life of 8,000 hours.  However, data from this instrument is still being analyzed & will be for some time to come.  Other instruments on Messenger are fine & the spacecraft has a life expectancy to 2015.  Our guest explained mission nominal life & the process for mission extensions with additional NASA funding. We talked about funding issues for Messenger & other planetary missions in light of NASA budget issues & the overall U.S. economy.  Dr. Lawrence told us how the missions compete for extension & additional funding, plus the requirements they must meet to be extended.  Listeners wanted to know about the application of Messenger & Mercury science to Earth & other solar system missions, our Moon, a NEO, even Mars.  Other listeners wanted to know Mercury’s distances from the sun & Earth, as well as more about possible tectonic activity on Mercury.  We discussed basic chemical elements found on Mercury as well as volatile elements.

In our second segment, Dr. Lawrence was asked to identify the biggest surprise so far which he said had to do with the composition of the planet & volatile elements with high concentrations of sulfur & sodium, among others.  A listener asked about Mercury radiation levels & another listener wanted to know how Mercury crater’s got their names.  Dr. Lawrence then took us through the crater naming process which you can also read about on the Messenger websites.  We talked about Messenger’s discovery of Hollows (see, http://science.nasa.gov/science-news/science-at-nasa/2011/24oct_sleepyhollows).  One listener asked our guest how one gets on a science team like Messenger. Dr. Lawrence explained the paths to joining these teams.  Mercury’s high density came up & our guest talked about most all of the iron on the planet being concentrated in its core.  We also talked about data analysis, archives, embargos, & availability.  Our guest directed us to the NASA Planetary Portal System for more information.  Near the end, we talked about the NASA Discovery Program & other successful Discovery missions including Dawn.

Please post your comments/questions on The Space Show blog.  You can email Dr. Lawrence through me or the APL Messenger website.

The John Batchelor Show “Hotel Mars,” Wednesday, 11-7-12 November 8, 2012

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The John Batchelor Show “Hotel Mars,” Wednesday, 11-7-12

http://archived.thespaceshow.com/shows/1889-BWB-2012-11-07.mp3

Guests: John Batchelor, Tariq Malik, Dr. David Livingston:  Topics:  Probable space policy in President Obama’s second term.  You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, http://thespaceshow.wordpress.com. You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, http://thespaceshow.wordpress.com. Comments, questions, and any discussion must be relevant and applicable to Space Show programming. Written Transcripts of Space Show programs are not permitted without prior written consent from The Space Show (even if for personal use) & are a violation of the Space Show copyright. We do not permit the commercial use of any Space Show program or part thereof, nor do we permit Space Show programs to be edited, placed on YouTube, or other private channels & websites. Space Show programs can be quoted in news articles, papers, academic & research work but must be cited or referenced in the proper citation format. Contact Dr. Livingston for questions about our copyright and trademark policies which we do enforce.  This program is archived on The Space Show website, podcasting, and blog sites with permission from John Batchelor. Please visit the John Batchelor Show website for more information about this fine program, www.johnbatchelorshow.com. During our 11 minute discussion, Tariq Malik of Space.com talked about the probable space policy in the Obama second term.  We talked about astronauts going to NEOs, lunar development as a stepping stone, ISS issues, budget risks, and more. John asked about the Dawn Mission and Vesta for a like human spaceflight mission.  We asked Tariq how he thought commercial crew programs and COTS would do over the near term, also about SLS and Orion.  We also highlighted many of the items that Space.com writer Dr. Mike Wall wrote about in his Space.com article on the subject at www.space.com/18373-presidential-election-obama-nasa-future.html.

If you have questions or comments about this segment, please post them on The Space Show blog above.  You can contact Mr. Batchelor or Tariq Malik through me at drspace@thespaceshow.com.

Dr. Anita Sengupta, Tuesday, 8-28-12 August 29, 2012

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Dr. Anita Sengupta, Tuesday, 8-28-12

http://archived.thespaceshow.com/shows/1843-BWB-2012-08-28.mp3

Guest:  Dr. Anita Sengupta.  Topics:  Entry, Descent, & Landing for Mars, Venus, propulsion, parachute issues, & more.  You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, http://thespaceshow.wordpress.com. Comments, questions, and any discussion must be relevant and applicable to Space Show programming. Transcripts of Space Show programs are not permitted without prior written consent from The Space Show (even if for personal use) & are a violation of the Space Show copyright.  We welcomed Dr. Anita Sengupta, Senior Systems Engineer at JPL in Entry, Descent & Landing (EDL) Advanced Technologies Group to discuss EDL for Mars, other planets, and much more.  In our first segment, Dr. Sengupta described conditions relevant to Mars and landing an object on the planet. We talked about the Martian atmosphere and what an EDL team needs to consider and design to land any payload on Mars as well as humans. We also learned that EDL for a different size payload would be different than what was used for Curiosity, probably needing new systems.  We talked about supersonic parachutes & parachutes in general, addressing parachute materials, velocity, parachute violent extremes, the speed of sound & much more.  Another topic was testing on Earth to make sure the devices work on Mars.  Dr. Sengupta explained how such testing & Mars simulation is done on Earth.  Other landing techniques such as airbags were mentioned along with retro rockets.  During this discussion, our guest did a great job of explaining the various forces and physics involved in landing & how each of these forces must be dealt with for a successful landing.  We then talked about landing a payload on Venus and just how different Venus is to Mars.  The same for our Moon and the moons of Mars, Phobos & Deimos.  Listeners sent in questions about the rover debris being left on Mars as well as wondering if there were other ways to explore Mars than using rovers.  John called to inquire about first stage reusability & our guest talked about doing the “trades” (running the numbers to see if reusability is economic or not). Doug called to talk about orbital transfer vehicles, aerobraking, and more.  This led us to a discussion about larger launch vehicles, the need to dissipate lots of energy on reentry, and why larger areas with drag are preferable.

In our second segment, I asked about software programs we might use for the basic type of analysis Dr. Sengupta had been discussing. Note her recommendations.  We then talked about plasma propulsion and ion thrusters.  Dr. Sengupta had much to say on this subject including ion thruster fuel, costs, ISP, and again, the importance of doing trade studies for a mission to determine the best methodology/economics for the mission. Our guest also talked about the lower ISP Hall ion thruster which was also lower in cost but with substantially more ISP than a chemical engine.  Also in this segment, we talked about the Dawn mission & Vega, a possible Europa mission & the use of nano satellites for the Europa mission.  Doug called back regarding ion propulsion fuel, xenon, iron, lunar fuel, etc.  As our program was ending, Anita mentioned the Orion parachute system tests she works on & the new Mars mission InSight.  Several times during the program, Dr. Sengupta stressed the need to do the trade studies regarding mission planning to determine the best economics & cost effectiveness for the mission.  Many of you have heard on The Space Show that if one does not “run the numbers,” it is impossible to know if what you want to do is economically & mission productive/viable.  On Oct. 28, Dr. Jurist is doing a special webinar with his interactive Excel spreadsheet on rocket/mission planning.  It is essential to be able to do this in mission planning.  Trusting your beliefs, gut, & preferences are not the way to go so watch this webinar if you can.

Please post questions/comments on our blog.

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