Bob Zimmerman spoke on the John Batchelor Show on the Thursday program about the following topics:

1. Three astronauts on the way to ISS.
2. Musk confirms that SpaceX will do tests of a powered return of its first stage on future Falcon 9 launches.
3. Sequestration and big science (see the post on Behind-the-Black)
4. The ice ages and CO2: In the past temperature changes caused changes in the amount of CO2 in the atmosphere, rather than CO2 causing changes to the climate’s temperature.

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Alan Hale of The Earthrise Institute and co-discoverer of Comet Hale-Bopp in 1995, talked on the Hotel Mars segment of the John Batchelor Show on Wednesday about Comet PANSTARRS and other comets in the sky this year: The John Batchelor Show “Hotel Mars,” Wednesday, 3-27-13 – Thespaceshow’s Blog.

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Bruce Cordell of 21st Century Waves spoke on the Space Show on Friday about “space trends for 2013 and the coming period of Ebullience for grand space projects” : Dr. Bruce Cordell, Friday, 3-29-13 – Thespaceshow’s Blog