Broadcast 2951 Hotel Mars with LTC Lindley Johnson, Guest

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Guests: John Batchelor, Lindley Johnson, Dr. David Livingston.  Topics:  NASA Planetary Defense, NEOs and asteroids, detection, mitigation strategies.  You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog. 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,  Remember, your Amazon Purchases Can Help Support The Space Show/OGLF ( note that audio and transition issues are a result of copying the John Batchelor broadcast & are not within my control as they originate in the Batchelor studio.

John Batchelor and I welcomed Lindley Johnson, head of the NASA office of Planetary Defense, to discuss planetary defense, the risk of an asteroid or NEO hitting Earth, detection methods, risk rating scales, dangerous sizes and mass as well as figuring out what might happen with an ocean impact as compared to an impact on land.  We talked about finding the NEOs using ground based telescopes and radar plus other methods along with many international organizations and partners.  Don't miss what our guest said about possible detection sizes, the risks presented by NEOs of various sizes, the number of items found so far plus what still may be out there that has not yet been found.  We addressed what was meant by the term "greater than zero" as related to the two risks scales, the Torino and Palermo JPL scales.  As the segment was ending, we talked about how much time might be needed to mitigate the trajectory of an incoming rock.  Much more was discussed in this nearly 20 minute double segment Hotel Mars program. 

You can email Mr. Batchelor or Lindley Johnson  through me at  Mr. Johnson can also be reached through the NASA Office of Planetary Defense.





We present the Director of The NASA Office Planetary Defense

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19 Jul 2017 John Batchelor, Dr. David Livingston, Lindley Johnson
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