Guests: Classroom, Dr. Eligar Sadeh, Dr. John Jurist. Topics: Lesson 10 U.S. Space Policy, what it is, how its made. Please see The Space Show Classroom blog, Lesson 10 Archive Notes for information about this show. Lesson 10 got underway in the first segment with Dr. Sadeh talking about the nature of political policy, some of the players in formulating space policy, and the priorities for NASA in the context of overall US government policy. As you will hear, space policy is typically a means to another end. Dr. Sadeh provided us with several examples underscoring this perspective.

Guest: Dr. Kai-Uwe Schrogl. Topics: European space policy. We welcomed Dr. Kai-Uwe Schrogl, Director of the European Space Policy Institute (ESPI) to the show. Please visit their website for more information at www.espi.or.at. In our first segment, Dr. Schrogl told us what ESPI was and what they do. Note that he stressed they were a think tank, not an academic research center or educational institution. During this discussion, we compared and contrasted many aspects of European space policy with policy here in the States.

Guests: CLASSROOM. Dr. Henry Hertzfeld, Dr. John Jurist, Dr. Jim Logan. Topics: Lesson 9 Launch Systems Analysis and Economics. Please see The Space Show Classroom blog, Lesson 9 Archive Notes for information about this show ( http://spaceshowclassroom.wordpress.com). Lesson 9 focused on launch system economics, markets, demand, and the definition of commercial versus government launchers. In our fist segment, our guest panel expert, Dr. Hertzfeld, defined commercial which as you will hear was no easy task to do.

Guest: Diane Murphy. Topics: Rocket Racing League (RRL). We welcomed Diane Murphy of the Rocket Racing League (www.rocketracingleague.com) to the show. In our first segment, Ms. Murphy talked about the Rocket Racing League, what it is, what it has done so far and it what it will be doing in the future. She explained the air frame and the rocket engine and told us about the manufacturers of each. She also said that the air frame structure determines the performance of the vehicle, not the rocket motor.

Guest: Chris Carberry. Topics: Explore Mars, Inc, Mars goals and time tables. Chris Carberry is the Executive Director and co-founder of the new organization, Explore Mars, Inc. (www.exploremars.org) which was created to promote science and technology innovation and education with a use for Mars Exploration. In our first segment, Chris went into detail as to why his group thought it necessary to form a new Mars organization and he explained their early focus on prizes.

Guest: Michael Potter. Topics: "Orphans of Apollo," commercial space. Michael Potter was the guest to discuss his documentary film, "Orphans of Apollo" and the first Los Angeles screening which was to take place in San Pedro (Los Angeles) the evening of Friday, May 28, 2010. To find out more about the film, please visit www.orphansofapollo.com.

Guest: David Hook. Topics: SUSTAIN, space commerce, space policy, space economics. David Hook returned for this Space Show program to discuss several topics pertaining to commercial space development and policy. In our first segment, we reviewed the SUSTAIN conference from last year and talked about the Technology Roadmap that was developed from the conference but not activated.

Guest: Open Lines with Dr. David Livingston. Topics: Nuclear rockets and propulsion, bone loss, radiation, VASIMR. This Open Lines program was a two hour plus discussion without a break regarding many issues ranging from space policy to nuclear propulsion. The VASIMR was again a focal point for discussion and this took us into a lengthy discussion of nuclear propulsion. Nuclear Thermal Rockets were the main topic but other nuclear propulsion concepts were discussed. This seemed to be the overwhelming topic as caller after caller talked about nuclear propulsion as well as radiation.

Guest: Megan Prelinger. Topics, space advertising, aerospace engineering recruiting, early human spaceflight 1957-1962. Megan Prelinger, author of "Another Science Fiction: Advertising The Space Race 1957-1962," was the guest for this Space Show program. Her book is available on the One Giant Leap Foundation website and if you purchase it from this link, Amazon contributes to One Giant Leap and The Space Show. Please use www.amazon.com/dp/0922233357?tag=onegialeafou-20.

Guests: CLASSROOM: Dr. Jim Logan, Dr. John Jurist. Topics: Lesson 8, Human Factors Part Two. Drs. Logan and Jurist returned for this Classroom program which focused on long duration human spaceflight. As we started our first segment, I asked our guests what constituted long duration spaceflight. The working definition centered around spaceflight more than six months to a year in duration and any human spaceflight going beyond LEO.