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Book by Benjamin B. Ferencz and Ken Keyes, Jr.
PlanetHood: The Key to Your Survival and Prosperity (2nd Ed.: PlanetHood: The Key to Your Future) was written by Benjamin B. Ferencz and Ken Keyes, Jr
PlanetHood
Natural satellite orbiting Earth
Stern, S. Alan; Levison, Harold F. (2002). "Regarding the Criteria for Planethood and Proposed Planetary Classification Schemes". Highlights of Astronomy
Moon
Small planetary-mass object
Dynamicists usually prefer using gravitational dominance as the threshold for planethood, because from their perspective smaller bodies are better grouped with
Dwarf_planet
Large, round non-stellar astronomical object
(MJ). Some authors advocate that this be used as the upper limit for planethood, on the grounds that the internal physics of objects does not change between
Planet
Largest dwarf planet
(like Pluto itself) to satisfy geological but not dynamical ideas of planethood. In 1998, Brian G. Marsden of Harvard University's Minor Planet Center
Pluto
Types of planet by chemical mass
Are Out There? at NASA Stern and Levison, "Regarding the criteria for planethood and proposed planetary classification schemes," Highlights of Astronomy
List_of_planet_types
International Astronomical Union's Minor Planet Catalogue. The long road from planethood to reconsideration undergone by Ceres is mirrored in the story of Pluto
Definition_of_planet
Distant body in the outer Solar System
will eventually clear its neighborhood, and it can be considered for planethood. Using the unlikely highest estimated mass for Sedna of 2×1021 kg, Sedna's
Sedna_(dwarf_planet)
Most massive dwarf planet
Eris (minor-planet number 136199) is the most massive and second-largest known dwarf planet in the Solar System. It is a trans-Neptunian object (TNO) in
Eris_(dwarf_planet)
The Moon's circuit around Earth
Stern, S. Alan; Levison, Harold F. (2002). "Regarding the Criteria for Planethood and Proposed Planetary Classification Schemes". Highlights of Astronomy
Orbit_of_the_Moon
Uni, Varda, and Chiminigagua, also have moons, although their dwarf planethood is more doubtful. As of November 2025[update], 471 asteroid moons and
List_of_natural_satellites
American lawyer (1920–2023)
Council, Oceana 1994; ISBN 0-379-21207-2. Ferencz, B.: Keyes, K. Jr.: Planethood: The Key to Your Future, Vision Books 1988. Reprint 1991; ISBN 0-915972-21-2
Ben_Ferencz
American astronomer (born 1965)
Michael E. Brown (born June 5, 1965) is an American astronomer, who has been professor of planetary astronomy at the California Institute of Technology
Michael_E._Brown
Astronomic definition
of planets more clearly. Specifically, they claim that the hallmark of planethood is "the collective behavior of the body's mass to overpower mechanical
Geophysical definition of planet
Geophysical_definition_of_planet
Size-based definition of celestial objects
Levison, Harold F. (2002). Rickman, H. (ed.). "Regarding the criteria for planethood and proposed planetary classification schemes". Highlights of Astronomy
Planetary-mass_object
contrast to smaller bodies. This suggests that the threshold for dwarf planethood in the trans-Neptunian region is a diameter of ≈1000 km (thus including
List of possible dwarf planets
List_of_possible_dwarf_planets
Hypothetical planets further than Neptune
Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit. The search
Planets_beyond_Neptune
contrast to smaller bodies. This suggests that the threshold for dwarf planethood in the trans-Neptunian region is around 500 km radius. In 2024, Kiss et
List of gravitationally rounded objects of the Solar System
List_of_gravitationally_rounded_objects_of_the_Solar_System
Criterion for a celestial body to be considered a planet
Stern, S. Alan; Levison, Harold F. (2002). "Regarding the criteria for planethood and proposed planetary classification schemes" (PDF). Highlights of Astronomy
Clearing_the_neighbourhood
Phrase used to remember the planets of the Solar System
A planetary mnemonic refers to a phrase created to remember the planets and belts of smaller bodies of the Solar System, with the order of words corresponding
Planetary_mnemonic
2006 International Astronomical Union definition
The International Astronomical Union (IAU) adopted in August 2006 the definition made by Uruguayan astronomers Julio Ángel Fernández and Gonzalo Tancredi
IAU_definition_of_planet
American planetary scientist
Stern, S. Alan; Levison, Harold F. (2002). "Regarding the criteria for planethood and proposed planetary classification schemes" (PDF). Highlights of Astronomy
Harold_F._Levison
Stern, S. Alan; Levison, Harold F. (2002), "Regarding the criteria for planethood and proposed planetary classification schemes" (PDF), Highlights of Astronomy
Glossary_of_astronomy
American personal growth author (1921–1995)
lawyer Benjamin Ferencz, Keyes wrote another book on world politics, PlanetHood. Keyes and Penny eventually were divorced and the Ken Keyes College closed
Ken_Keyes_Jr.
Astronomical observatory
Retrieved 18 October 2011. Hal Levison. "A Hand-Waving Derivation of Planethood". Planetary Science Directorate. Southwest Research Institute, Boulder
United States Naval Observatory Flagstaff Station
United_States_Naval_Observatory_Flagstaff_Station
Book by Neil deGrasse Tyson
The Pluto Files: The Rise and Fall of America's Favorite Planet is a book written by the astrophysicist and Hayden Planetarium director Neil deGrasse Tyson
The_Pluto_Files
American engineer and planetary scientist (born 1957)
Stern, S. Alan; Levison, Harold F. (2002). "Regarding the criteria for planethood and proposed planetary classification schemes" (PDF). Highlights of Astronomy
Alan_Stern
Novel series by Dav Pilkey
Ricky Ricotta's Mighty Robot is a series of illustrated children's books written by Dav Pilkey (best known for his Captain Underpants books). The first
Ricky_Ricotta's_Mighty_Robot
Book by Michael E. Brown
How I Killed Pluto and Why It Had It Coming is a 2010 memoir by Mike Brown, the American astronomer most responsible for the reclassification of Pluto
How I Killed Pluto and Why It Had It Coming
How_I_Killed_Pluto_and_Why_It_Had_It_Coming
9th episode of the 1st season of Rick and Morty
"Something Ricked This Way Comes" is the ninth episode of the first season of the American science fiction comedy television series Rick and Morty. Aired
Something Ricked This Way Comes
Something_Ricked_This_Way_Comes
PLANETHOOD
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Girl/Female
Australian, Greek, Latin
Flower Name; Rose; Form of Rose
Surname or Lastname
English
English : habitational name from places in Lancashire and Staffordshire, so named from Old English hyll ‘hill’ + tūn ‘enclosure’, ‘settlement’.
Boy/Male
Indian, Sanskrit
Banner; Wall; Fence; Sun
Girl/Female
Indian, Marathi
Desire; Wish
Surname or Lastname
English (Midlands)
English (Midlands) : unexplained.
Boy/Male
English American French German
Abbreviation of Robert 'Famed; bright; shining.
Girl/Female
Australian, German, Spanish
Female Version of Carlos Manly
Girl/Female
Arabic, Muslim
Wealth; Riches
Female
Turkish
Turkish name FIDAN means "sapling."
Girl/Female
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Telugu
Goddess Durga; Goddess who Rides Tiger
PLANETHOOD
PLANETHOOD
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PLANETHOOD