Filmography
| 2022 | Searching for Planet 9 · as Self |
| 2019 | Pluto and Beyond · as Himself |
| 2014 | Xploration Outer Space (TV Series) · as Self - Professor Of Planetary Astronomy, Caltech |
| 2010 | How the Universe Works (TV Series) · as Self - Astronomer |
| 2009 | Known Universe (TV Series) · as Self |
| 2007 | The Universe (TV Series) · as Self - Caltech |
| 1975 | PBS News Hour (TV Series) · as Self |
| 1974 | NOVA (TV Series) · as Self |
| 1968 | 60 Minutes (TV Series) · as Self - Astronomer (segment "the Hunt For Planet Nine") |