Broadcast 3294 Hotel Mars with Dr. David Grinspoon

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Guests: John Batchelor, Dr. David Grinspoon, Dr. David Livingston.  Topics:  Ultima Thule and New Horizons spacecraft.  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 back Dr. David Grinspoon to discuss New Horizons and updates for Ultima Thule in the Kuiper Belt.  Dr. Grinspoon talked about the low velocity impact that brought the two objects Ultima and Thule together, plus he was asked how we knew the two objects were actually stuck together.  Other topics included small objects in the Kuiper Belt, future targets for New Horizons and limitations on finding future targets, plus the concept that Ultima Thule was a frozen in time model for how the early universe was created.  Our guest described what was meant by saying Ultima Thule was a contact binary, he discussed the absence of surface fractures and what that meant and much more.

You can email Mr. Batchelor or Dr. Grinspoon  through me at




Ultima Thule update

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03 Apr 2019 John Batchelor, Dr. David Grinspoon, Dr. David Livingston
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