In 2023 the Boulder Cosmology Group met remotely using Zoom from 6PM to 8PM for reading discussions on Third Mondays. All meetings were free and open to the public. Dates and locations changed from the normal pattern were noted below.

See http://www.sackett.net/cosmologyAll.htm for a list of all meetings of the Cosmology Group since it began in 2003.

January 23, 2023 Book Discussion: Deep Down Things, by Bruce Schumm. Chapters 6 and 7.
Study guide from Jeff. Notes from Paul and Chela on Lie Groups in Physics for Chapters 6 through 8.
The pages 19 to 21 of this document (errata and comments) were added for this 2023 discussion.
Note: This ^^^^ discussion is a week later than usual because of Martin Luther King Day.

February 27, 2023 Book Discussion: Deep Down Things, by Bruce Schumm. Chapter 8.
Study guide from Jeff. Notes from Paul and Chela on Lie Groups in Physics for Chapter 8.
Note: This ^^^^ discussion is a week later than usual because of Presidents' Day.

March 20, 2023 Book Discussion: Deep Down Things, by Bruce Schumm. Chapters 9 and 10. Study guide from Jeff.
A note from Mike on Chapter 9's coverage of the effective mass of a photon: http://www.sackett.net/PhotonEffectiveMass.pdf.
Comments on Jeff's Study Guide from Dave.

April 17, 2023 Book Discussion: More and Different: notes from a thoughtful curmudgeon, by Philip W. Anderson. Chapters I through III.
Reference: A 1972 Anderson paper, http://www.sackett.net/MoreIsDifferent.pdf.

May 15, 2023 Book Discussion: More and Different: notes from a thoughtful curmudgeon, by Philip W. Anderson. Chapters IV, V, VIII, IX, X.

June 19, 2023 Book Discussion: The Magic Furnace: The Search For The Origins Of Atoms, by Marcus Chown. Parts I and II.
     Paul's printable Chronological Glossary for The Magic Furnace (23 pages). Alphabetical Glossary (16 pages).

July 17, 2023 Book Discussion: The Magic Furnace: The Search For The Origins Of Atoms, by Marcus Chown. Part III and Epilogue.
     Paul's printable Chronological Glossary for The Magic Furnace (23 pages). Alphabetical Glossary (16 pages).
Here is a very relevant article about the origins of the elements that Chela and Susan found.

August 21, 2023 Book Discussion: Chandra's Cosmos, by Wallace H. Tucker. Part 1.
Revelations from NASA's X-Ray Observatory. Link to the book: http://sackett.net/chandras-cosmos.pdf.

September 18, 2023 Book Discussion: Chandra's Cosmos, by Wallace H. Tucker. Part 2.
Revelations from NASA's X-Ray Observatory. Link to the book: http://sackett.net/chandras-cosmos.pdf.

October 16, 2023 Book Discussion: Chandra's Cosmos, by Wallace H. Tucker. Part 3.
Nature Magazine article from Peter aboout gravity waves from merging neutron stars.
Revelations from NASA's X-Ray Observatory. Link to the book: http://sackett.net/chandras-cosmos.pdf.

November 20, 2023 Book Discussion: Quantum Field Theory, As Simply as Possible by Anthony Zee. Parts I and II.
Review of this book from Dave: http://www.sackett.net/PetersonReviewOfZeeSimpleQFT.pdf.
Link to the book: http://sackett.net/ZeeQFTSimply.pdf.

December 18, 2023 Book Discussion: Quantum Field Theory, As Simply as Possible by Anthony Zee. Parts III and IV.
Link to the book: http://sackett.net/ZeeQFTSimply.pdf.

For more information, contact Bill at 3.449.4136.

This is http://www.sackett.net/cosmologySchedule2023.htm, last updated August 1, 2024.