Filmography
| 2023 | UFOs: Investigating the Unknown · as Self - Chief Astronomer, The Franklin Institute |
| 2020 | Touching the Asteroid · as Self |
| 2020 | Mars: One Day on the Red Planet · as Self - Astronomer |
| 2019 | Pluto and Beyond · as Himself |
| 2019 | The UnXplained · as Self - Chief Astronomer, The Franklin Institute |
| 2019 | CBS Evening News · as Self - Chief Astronomer, The Franklin Institute |
| 2019 | The Apollo Chronicles · as SelfSu Plex |
| 2019 | Breakthrough: The Ideas That Changed the World · as Self - Chief Astronomer, The Franklin Institute |
| 2017 | Miniverse · as Self |
| 2016 | Join or Die with Craig Ferguson · as Self - Special Guest |
| 2014 | Xploration Outer Space · as Self - Chief Astronomer, The Franklin InstituteSu Plex |
| 2012 | CBS Mornings · as Self |
| 2009 | The Ed Show · as Self |
| 2009 | Ancient Aliens · as Self - Chief Astronomer, The Franklin Institute |
| 2005 | The Colbert Report · as Self - Guest |
| 2005 | The Late Late Show with Craig Ferguson · as Self |
| 1993 | Modern Marvels · as Self - Chief Astronomer, Franklin Institute |
| 1983 | Newton's Apple · as Self - Astronomer |
| 1974 | NOVA · as Self |