Pat Harrington, Schneider on 'One Day at a Time,' dead | CNN
Nibiru and Planet X | Answers in Genesis
Robert Harrington Planet X - YouTube
Why is Pluto not a planet? | BBC Sky at Night Magazine
Dr. Robert S. Harrington - Planet X Nibiru | Harrington, Planets, Mars and earth
In Depth | Charon – NASA Solar System Exploration
IDEAS AND TRENDS; CLUES GET WARM IN THE SEARCH FOR PLANET X - The New York Times
In Depth | Charon – NASA Solar System Exploration
Claims about new planets that turned out to be wrong – and why 'Planet Nine' may be different
Robert Sutton Harrington – Wikipedia
Robert Harrington | The Planetary Society
Pluto's long, strange history — in pictures | Nature
An ancient stellar flyby could have put Planet Nine into its distant orbit | Astronomy.com
Meet the Doc Who Put Hydroxychloroquine on Trial in COVID-19
This Month in Astronomical History: The Discovery of Pluto | American Astronomical Society
Is the Phantom Planet Real? | Air & Space Magazine| Smithsonian Magazine
10 Important Dates in Pluto History | Britannica
Knowledge Apocalypse 2012 Edition: Ancient Aliens, Planet X & The Lost Cycle Of Time: Martell, Jason: 9781469953953: Amazon.com: Books
Bob Harrington Obituary
Special Topic: "Active Asteroids" - RocketSTEM
This Month in Astronomical History: The Discovery of Pluto | American Astronomical Society
In Depth | Charon – NASA Solar System Exploration
Robert Harrington, 50, Astronomer in Capital - The New York Times
Pluto's long, strange history — in pictures | Nature
Robert Stigwood, force behind "Saturday Night Fever" and "Grease," dies | CNN
