100th Anniversary of the Shapley - Curtis Great Debate

1920: Scale of the Universe Debate

• History & brief summaries: About the 1920 Greate Debate | Wikipedia | This Month in Astronomical History | Astronomy's Great Remembrance
• Virginia Trimble: History of the Scale of the Universe Debate
• Deborah Shapley (Granddaughter): Harlow Shapley: Discovering Our Place in the Galaxy | harlowshapley.com
• Sarah & Robert Curtis (Great-great Granddaughter & Great-Grandson): The Family Legacy of Heber Doust Curtis

2020: Life in the Universe Debate

• Jill Tarter (SETI Institute): Overview: Here and Now: A Century Later
  
• Glossary: Frequently used terms
• Introduction: The Life in the Universe Debate in 2020

Debate Question: How will humanity first discover extraterrestrial life?

• Jessie Christiansen (Scientist: NASA Exoplanet Inst.)
• Charles Cockell (Prof. of Astrobiology: U. Edinburgh)
• Guy Consolmagno (Director: Vatican Observatory)
• Richard Tresch Fienberg (AAS, Sky & Telescope)
• Timothy Ferris (Author, Producer: PBS: Life Beyond Earth)
• Robert Gendler (Author: A Year in the Life of the Universe)
• James Green (Chief Scientist: NASA)
• David Grinspoon (Senior Scientist: Planetary Science Institute)
• Paul Hertz (Director of Astrophysics: NASA)
• Sabine Hossenfelder (Frankfurt IAS, Backreaction Blog)
• Stephen Maran (AAS Press Officer: 1984-2009)
• John Mather (NASA, Nobel Prize in Physics 2006)
• Robert Nemiroff (Prof: Michigan Tech; PI: APOD)
• Martin Rees (Cambridge U., Astronomer Royal UK)
• Caleb Scharf (Columbia U., Director of Astrobiology)
• Sara Seager (Prof. of Planetary Science, MIT)
• Seth Shostak (Senior Astronomer: SETI Institute)
• Ethan Siegel (Starts with a Bang Blog)
• David Spergel (Princeton U., Flatiron Ins.)
• Jill Tarter (SETI Institute)
• Peter Ward (Professor: U. Washington)