Selected Talks

• The mysteries of gaps and pile-ups at planetary resonances (YouTube)
  University of Arizona, Origins Seminar, December 2022

• Pluto on the edge of strong chaos (YouTube)
  University of Colorado-Boulder, APS Colloquium, April 2022

• Earth's Quasi-Satellite (469219) Kamo`oalewa (.mp4)
  Tsinghua University+, Virtual Seminar, December 2021

• New results on first order orbital resonances
  XX Colóquio Brasileiro de Dinâmica Orbital 2020/2021, Invited presentation, December 2021 (YouTube)
  IAU Symposium 364, Invited presentation, October 2021 (YouTube)
  

• Asteroid Belt Dynamics and Statistics (.mov)
  AAS-DDA Meeting, Invited presentation, August 2020

• Planet migration in the solar system (.pdf)
  Conference for University Women in Physics/University of Oklahoma, Invited presentation, January 2020

• The case for a deep search for Earth’s Trojan asteroids (.pdf)
  The University of Arizona/Earths in Other Solar Systems, September 2019

• Prospects for Unseen Planets Beyond Neptune (YouTube)
  Lecar Prize Lecture, Harvard-Smithsonian Center for Astrophysics, September 2018

• Prospects for Unseen Planets Beyond Neptune (.pdf)
  Cornell University-Thomas Gold Lectures/Astronomy Colloquium, May 2018

• The mass distribution of planets (.pdf)
  Invited Presentation -- Special Session "Inner Solar Systems", AAS-Austin, June 2017

• Planet Nine - TEDx Portland, April 2017 (YouTube)

• Corralling a distant unseen planet with extreme resonant Kuiper belt objects
  DPS-EPSC (October 2016) (.mov, 0.7mb)
  NOAO-FLASH (December 2016) (.mov, 1.7mb)

• Impact Seasons on Mars (.mov)
  iPLEX/UCLA, Nov 2015

• The mass distribution of planets (.mov)
  iPLEX/UCLA, Nov 2015

• Pluto, the Kuiper belt and the early history of the solar system (YouTube)
  SETI Institute, July 2015

• A few points on the dynamical evolution of the young solar system (PDF)
  AAS-DDA Meeting, April-May 2014

• Solar System(s) Science with LSST (PDF)
  LSST-SAC Meeting, April 2014

• The Early History of the Solar System" (QuickTime)
  IAS/CfA/PSI/IIT-D/OSU/UA, 2010-2011

• Asymmetric impacts of near-Earth asteroids on the Moon (QuickTime)
  AAS-DPS Meeting, Oct 2009

• Migrating Planets (QuickTime)
  LPL Evening Lecture, Sep 2009

• Speculating on additional planets and debris in the OGLE-2006-BLG-109L system (QuickTime)
  AAS Meeting, June 2009

• On the importance of a few dwarf planets (QuickTime)
  AAS Meeting, June 2009, public talk