Guests: John Batchelor, Dr. Marc Rayman, Dr. David Livingston. Topics: We discussed the Dawn Mission on the way to Ceres. 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, www.johnbatchelorshow.com. Remember, your Amazon Purchases Can Help Support The Space Show/OGLF (www.onegiantleapfoundation.org/amazon.htm). For those of you listening to archives on live365.com & rating the programs, please email me the reasons for your rating. This will definitely help improve Space Show programming. Thank you. Please 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 Dr. Marc Rayman to the show to discuss the Dawn Mission which is on its way to a very close pass and orbit of the dwarf planet Ceres. We talked about navigating Dawn to Ceres, water, ion propulsion, Vesta, and more. Dawn is 330 million miles from Earth or a million times the distance from Earth to the ISS. Don't miss this Hotel Mars segment. Please post your comments/questions on TSS blog. You can email Mr. Batchelor or Dr. Rayman through me at drspace@thespaceshow.com.