Planetary Radio • Aug 30, 2017
Planetary Radio Live on the Eve of the Eclipse
On This Episode
![20170830 bob baer thumbnail](https://planetary.s3.amazonaws.com/web/assets/pictures/_576x576_crop_center-center_60_line/20170830_bob-baer-thumbnail.jpg)
Bob Baer
Carbondale Solar Eclipse Steering Committee Co-Chair and Illinois Citizen CATE Coordinator for Southern Illinois University
![20170830 steven clarke thumbnail](https://planetary.s3.amazonaws.com/web/assets/pictures/_576x576_crop_center-center_60_line/20170830_steven-clarke-thumbnail.jpg)
Steven Clarke
Director of the Heliophysics Division, Science Mission Directorate for NASA Headquarters
![20170830 Thanasis Economou thumbnail](https://planetary.s3.amazonaws.com/web/assets/pictures/_1200x1200_crop_center-center_82_line/20170830_Thanasis-Economou-thumbnail.jpg)
Thanasis Economou
Senior Scientist for University of Chicago Enrico Fermi Institute
![20170830 Mike Kentrianakis thumbnail](https://planetary.s3.amazonaws.com/web/assets/pictures/_576x576_crop_center-center_60_line/20170830_Mike-Kentrianakis-thumbnail.jpg)
Mike Kentrianakis
Eclipse Project Manager for American Astronomical Society
![20170830 Nergis Mavalvala thumbnail](https://planetary.s3.amazonaws.com/web/assets/pictures/_576x576_crop_center-center_60_line/20170830_Nergis-Mavalvala-thumbnail.jpg)
Nergis Mavalvala
Marble Professor of Astrophysics for Massachusetts Institute of Technology
![20170830 lou mayo thumbnail](https://planetary.s3.amazonaws.com/web/assets/pictures/_576x576_crop_center-center_60_line/20170830_lou-mayo-thumbnail.jpg)
Lou Mayo
Heliophysicist and Science Educator for NASA Goddard Spaceflight Center
![20170830 kevin morefield thumbnail](https://planetary.s3.amazonaws.com/web/assets/pictures/_576x576_crop_center-center_60_line/20170830_kevin-morefield-thumbnail.jpg)
Kevin Morefield
Astrophotographer
![20170830 michelle nichols thumbnail](https://planetary.s3.amazonaws.com/web/assets/pictures/_768x768_crop_center-center_60_line/20170830_michelle-nichols-thumbnail.jpg)
Michele Nichols
Director of Public Observing for Adler Planetarium
![20170830 Lucianne Walkowicz thumbnail](https://planetary.s3.amazonaws.com/web/assets/pictures/_576x576_crop_center-center_60_line/20170830_Lucianne-Walkowicz-thumbnail.jpg)
Lucianne Walkowicz
Baruch S. Blumberg Chair in Astrobiology, Library of Congress for Astronomer, Adler Planetarium
With hours to go before the Great American Eclipse, nine outstanding guests joined host Mat Kaplan for Planetary Radio Live in front of 1,100 rowdy eclipse and space science fans. Also at Southern Illinois University Carbondale for the show was the Jenny Johnson Band with its new song, “Solar Eclipse.” Bruce Betts arrives later with a post-eclipse What’s Up report. The guys have found one last rubber asteroid to give away in the space trivia contest.
![Planetary Radio Live on the eve of the eclipse](https://planetary.s3.amazonaws.com/web/assets/pictures/_1200x799_crop_center-center_82_line/20170830_8-20-17-planetary-radio-live-eclipse-eve-siuc.jpg 1200w, https://planetary.s3.amazonaws.com/web/assets/pictures/_768x511_crop_center-center_60_line/20170830_8-20-17-planetary-radio-live-eclipse-eve-siuc.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x383_crop_center-center_60_line/20170830_8-20-17-planetary-radio-live-eclipse-eve-siuc.jpg 576w)
![Mat Kaplan at Planetary Radio Live on the eve of the eclipse](https://planetary.s3.amazonaws.com/web/assets/pictures/_1200x799_crop_center-center_82_line/20170830_mat-planetary-radio-live-siuc-eclipse.jpg 1200w, https://planetary.s3.amazonaws.com/web/assets/pictures/_768x511_crop_center-center_82_line/20170830_mat-planetary-radio-live-siuc-eclipse.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x383_crop_center-center_82_line/20170830_mat-planetary-radio-live-siuc-eclipse.jpg 576w)
![Planetary Radio Live guests on the eve of the eclipse](https://planetary.s3.amazonaws.com/web/assets/pictures/_1200x799_crop_center-center_82_line/20170830_mat-with-planetary-radio-live-guests-siuc.jpg 1200w, https://planetary.s3.amazonaws.com/web/assets/pictures/_768x511_crop_center-center_60_line/20170830_mat-with-planetary-radio-live-guests-siuc.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x383_crop_center-center_60_line/20170830_mat-with-planetary-radio-live-guests-siuc.jpg 576w)
![Mat Kaplan hosts the SIUC eclipse event at Saluki Stadium](https://planetary.s3.amazonaws.com/web/assets/pictures/_1200x799_crop_center-center_82_line/20170830_mat-kaplan-hosts-eclipse-siuc-saluki-stadium.jpg 1200w, https://planetary.s3.amazonaws.com/web/assets/pictures/_768x511_crop_center-center_82_line/20170830_mat-kaplan-hosts-eclipse-siuc-saluki-stadium.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x383_crop_center-center_82_line/20170830_mat-kaplan-hosts-eclipse-siuc-saluki-stadium.jpg 576w)
![Over 14,000 people gathered at SIUC Saluki Stadium to celebrate the eclipse](https://planetary.s3.amazonaws.com/web/assets/pictures/_1200x799_crop_center-center_82_line/20170830_14000-at-siu-carbondale-siuc-salukistadium-for-eclipse.jpg 1200w, https://planetary.s3.amazonaws.com/web/assets/pictures/_768x511_crop_center-center_60_line/20170830_14000-at-siu-carbondale-siuc-salukistadium-for-eclipse.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x383_crop_center-center_60_line/20170830_14000-at-siu-carbondale-siuc-salukistadium-for-eclipse.jpg 576w)
Related Links:
- Video of August 20, 2017 Planetary Radio Live at Southern Illinois University Carbondale
- Jenny Johnson Band
- Cassini: The Grand Finale
- The 2017 North American Total Solar Eclipse
- Southern Illinois University Carbondale Eclipse Website
- NASA Eclipse Coverage
- Chop Shop Planetary Society Store
This week's prizes are the brand new Chop Shop-designed Planetary Radio t-shirt, a 200-point iTelescope.net astronomy account, and a rubber Planetary Society asteroid.
This week's question:
Giovanni Domenico Cassini, for whom the Cassini mission is named, began a mapping project that was continued by four generations of Cassinis, especially his grandson and great-grandson. What did they map?
To submit your answer:
Complete the contest entry form at http://planetary.org/radiocontest or write to us at [email protected] no later than Wednesday, September 6th at 8am Pacific Time. Be sure to include your name and mailing address.
Last week's question:
To within a minute, what is the longest possible time of totality for a solar eclipse seen from Earth?
Answer:
The answer will be revealed next week.
Question from the week before:
What is the funny word used when three celestial bodies are lined up, as in an eclipse? It’s not “stooges.”
Answer:
No answer this week! We’ll announce the winners of two contests next week.