- #1
WaxyChicken
- 11
- 4
So I'm reading in the news and a group of scientists from the New Horizons missions
appear to be reopening "The Pluto Debate" with yet another new definition of planet
at the Lunar and Planetary Science Conference in March. If accepted their definition
of planet would increase the number of planets in Solar System to about 110.
( http://www.popsci.com/pluto-might-be-planet-again )
So, just for fun, I'm trying to figure out a set of rules that would:
1 - define Pluto as a "Planet" (to quell the nostalgic masses)
2 - define Ceres as a "Dwarf Planet"
3 - permit rouge planets to be "Rouge Planets"
and 4 - permit multiple planets in the same orbit (eg: if Mars and Earth shared the same orbit but on opposite sides of the sun then they can still be planets with moons)
I enjoy brain puzzles like these and also wonder if the PhysicsForums.com community
can actually manage to come up with a set of definitions that would out-do what was
accepted 10 years ago and what will be proposed by the New Horizon's team in March.
So here is my attempt, debug it for some fun (if you, too, enjoy these types of brain puzzles)
Planet:
A sub-stellar mass body that is not currently undergoing nuclear fusion, has sufficient gravitation to assume a spheroidal shape adequately described by a triaxial ellipsoid, and is the main gravitational object of it's own system.
A planet may or may not orbit a star or stars, may or may not have other objects in it's own system.
(Eg: Martian System, Jovian system, Mercury)
Moon / Moon-Type Planetary Satellite:
A Sub-stellar mass body that is not currently undergoing nuclear fusion,
and has a mass equal to or greater than 10*1015 kg, and orbits a non-star object.
non Moon-Type Satellite:
A sub stellar mass body that is not currently undergoing nuclear fusion,
and has a mass less than 10*1015 kg
Dwarf Planet:
A sub-stellar mass body that is not currently undergoing nuclear fusion, has sufficient gravitation to assume a spheroidal shape adequately described by a triaxial ellipsoid, is the main gravitational object of it's own system, and has more than 0.06 G (0.61 m/s2) of gravity. A Dwarf Planet may or may not have other objects in it's system.This is not intended as personal theory or speculation that go beyond or counter to generally-accepted science, but instead just a fun brain challenge and fully expect other people to make better definitions than my own or teach me a new word (like triaxial ellipsoid!)
You must admire Clyde Tombaugh. After years of hard work to accomplish what should of been impossible, his discovery of Pluto keeps pulling people to astronomy and science still today. If for no other reason than because some people still wonder "what the heck is that?"
appear to be reopening "The Pluto Debate" with yet another new definition of planet
at the Lunar and Planetary Science Conference in March. If accepted their definition
of planet would increase the number of planets in Solar System to about 110.
( http://www.popsci.com/pluto-might-be-planet-again )
So, just for fun, I'm trying to figure out a set of rules that would:
1 - define Pluto as a "Planet" (to quell the nostalgic masses)
2 - define Ceres as a "Dwarf Planet"
3 - permit rouge planets to be "Rouge Planets"
and 4 - permit multiple planets in the same orbit (eg: if Mars and Earth shared the same orbit but on opposite sides of the sun then they can still be planets with moons)
I enjoy brain puzzles like these and also wonder if the PhysicsForums.com community
can actually manage to come up with a set of definitions that would out-do what was
accepted 10 years ago and what will be proposed by the New Horizon's team in March.
So here is my attempt, debug it for some fun (if you, too, enjoy these types of brain puzzles)
Planet:
A sub-stellar mass body that is not currently undergoing nuclear fusion, has sufficient gravitation to assume a spheroidal shape adequately described by a triaxial ellipsoid, and is the main gravitational object of it's own system.
A planet may or may not orbit a star or stars, may or may not have other objects in it's own system.
(Eg: Martian System, Jovian system, Mercury)
Moon / Moon-Type Planetary Satellite:
A Sub-stellar mass body that is not currently undergoing nuclear fusion,
and has a mass equal to or greater than 10*1015 kg, and orbits a non-star object.
non Moon-Type Satellite:
A sub stellar mass body that is not currently undergoing nuclear fusion,
and has a mass less than 10*1015 kg
Dwarf Planet:
A sub-stellar mass body that is not currently undergoing nuclear fusion, has sufficient gravitation to assume a spheroidal shape adequately described by a triaxial ellipsoid, is the main gravitational object of it's own system, and has more than 0.06 G (0.61 m/s2) of gravity. A Dwarf Planet may or may not have other objects in it's system.This is not intended as personal theory or speculation that go beyond or counter to generally-accepted science, but instead just a fun brain challenge and fully expect other people to make better definitions than my own or teach me a new word (like triaxial ellipsoid!)
You must admire Clyde Tombaugh. After years of hard work to accomplish what should of been impossible, his discovery of Pluto keeps pulling people to astronomy and science still today. If for no other reason than because some people still wonder "what the heck is that?"