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Dr. Robert Pappalardo, Monday, 7-27-15 July 28, 2015

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Dr. Robert Pappalardo, Monday, 7-27-15

http://archived.thespaceshow.com/shows/2514-BWB-2015-07-27.mp3

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Guest: Dr. Robert Pappalardo. Topics: The Europa Mission Development Plan plus information on this moon. 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. Robert Pappalardo to the show to discuss Europa and the upcoming Europa Mission by JPL which is now in the development phase. During the first segment of our 1 hour 27 minute program, Dr. Pappalardo talked about the origins of the NASA JPL Europa mission now in the development phase. He briefly described the experiments & instruments planned for the mission, then answered questions about the mission such as will the mission search for life. In response to this question, he said it would search for simple life through an indirect means which he described more fully in the second segment of the show. Our guest talked about having learned lots from the earlier Galileo spacecraft, especially about the Europa magnetic field and the likelihood of the oceans consisting of saltwater. Dr. Pappalardo also talked about the structure of Europa with the icy surface, oceans under the ice ad then a rocky base under the oceans. Dr. Pappalardo brought up the tidal heating of Europa and spoke to that quite a bit during the show. He talked about chemical energy and nutrients which may support simple life in the Europa oceans. Listener Joe asked how Europa could be in a habitable zone, even for simple life, given its cold temperatures. Our guest said Europa was expanding the definition of habitable zone & that the tidal heating was crucial to the possibility of finding simple life molecules. Don’t miss his complete response to this question. We talked mission timeline which was from about 2022 to the mid-2020s. We also learned that the Europa launch window was every 13 months. Our guest was asked about transit time to Europa. He said it depended on the rocket. With SLS it would be less than 3 years. Another rocket would take at least 3.5 years or longer. We also discussed bandwidth issues for getting data, images, and video back to Earth. I asked about the possibility of using cubesats as part of the Europa mission, then Bob talked about the radiation challenge which he said was significant because Jupiter acts as a giant particle accelerator. Don’t miss this discussion, especially the part abbot how much ice would be needed for effective shielding. Also, the Europa satellite will come as close as 25KM to the surface of Europa.

In the second segment, Bob went into detail about the scientific instruments that will comprise the Europa mission. He took us through each one in detail so don’t miss it. The radar pushes the technology envelope. So does the mass spectrometer. Harry wanted to know if a plutonium RTG would be used for power and if they were anticipating Cassini like protests. Bob said that they would be using solar power. Again, don’t miss the discussion. Cindy asked Bob about the length of the Europa day and year, another listener asked about Europa volcanoes and we learned that Europa has icy volcanoes. Amber wanted to know if the ice on Europa was the same as ice here on Earth. A UK listener wanted to know why Europa was not sucked into Jupiter by the planet’s huge gravity field. Don’t miss Bob’s explanation of this. Toward the end of the segment, he talked about the significance and importance of the search for simple life molecules/organics. Final questions concerned specific Europa classes at the college level & more on the European JUICE Mission and its plans for Europa. We agreed to stay in touch with one another regarding Europa and the upcoming mission so Dr. Pappalardo will be returning to The Space Show.

Please post your comments/questions on TSS blog above. You can reach Dr. Pappalardo through me or JPL.

Dr. Roger Launius, Friday, 12-2-11 December 3, 2011

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Dr. Roger Launius, Friday, 12-2-11

http://archived.thespaceshow.com/shows/1664-BWB-2011-12-02.mp3

Guest:  Dr. Roger Launius.  Topics:  National Air & Space Museum at the Smithsonian, Mars in our culture, Russian & U.S. Mars missions.  You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, https://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.  The Space Show/OGLF is now engaged in its annual fundraising drive. Please see & act upon our appeal at https://thespaceshow.wordpress.com/2011/11/21/space-show-2011-fundraising-campaign.  We welcomed back Dr. Roger Launius to the program.  His blog which we talked about during the interview can be seen at http://launiusr.wordpress.com.  We started our discussion with the mention of his recent blog post, “The Lure of the Red Planet: Early Flyby Missions to Mars.”  Dr. Launius went through a short history of Soviet/Russian attempts to go to Mars as well as those of the U.S. in recent years.  His blog article contains a more comprehensive listing of these missions and is a good resource for this information.  We talked about private enterprise doing Mars missions and our guest said the business case would have to close for that to happen and that we were not there yet.  I asked about cultural drivers concerning our interest in Mars. I also inquired about the symphony by Gustav Holtz, “The Planets” and his “Mars, Bringer of War.”  Dr. Launius talked about Mars in our culture going back to H.G. Wells, others in the early 1900’s, science fiction literature, as well as early astronomy.  Another of his blog posts we explored was his comparison of Sputnik to 9/11 as there were parallels and similarities.  Don’t miss this interesting discussion.  In our second segment, we talked about the Smithsonian getting the Discovery Space Shuttle, its eventual display, and the disposition of Enterprise which is currently at the Smithsonian.  Dr. Launius explained how they will display Discovery to preserve it as close to a real time flying shuttle as possible for historical purposes. We learned that visitors will not be able to walk through it.  He does explain the display plans in full, plus he talks about getting the shuttle from KSC to the museum near Dulles Airport and then getting Enterprise to New York as it is to be displayed at the Intrepid Museum.  Roger received listener questions about the display of the Enola Gay B-29 which is at the Smithsonian as well as SpaceShipOne.  Listeners also asked for his thoughts on Phobos-Grunt and its loss.  Our guest pointed out it was the 5th loss of a Russian mission in a year, pointing to some definite problems in the Russian space industry.  Some of the problems he described regarding the Russian space industry sounded similar to what is happening with our own space workforce.  Commercial space and the private sector came up for discussion with Roger saying that a big difference is that private enterprise will operate their vehicles, not the government.  Dr. Launius was asked about space tourism and if it was possible to evaluate any type of market based on visits and comments to the SpaceShipOne exhibit. We talked about STEM educational issues, protecting the Apollo lunar landing sites as historical sites, Pluto in the Smithsonian & the New Horizons Mission.  As our program ended, we talked about Plutonium 238 and RTGs for space missions.,  And a listener wanted to know about the plausibility of one way manned Mars missions.  Please post your comments/questions on The Space Show blog URL above.

 

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