planetary-mass object
Let an agent handle planetary-mass objects as a geophysical class spanning planets, dwarf planets and large moons, with sourced data.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Claude
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Classification Which body.
Criteria
Shape and mass.
Criteria
Criteria.
- Is the body in hydrostatic equilibrium? boundary
- How was that determined? provenance
Orbit
Planet, moon or rogue.
Orbit
Orbital class.
- What does it orbit, if anything? definition
- Which IAU class applies? provenance
Properties Measurements.
Mass and size
Values.
Mass
Mass and radius.
- What are its mass and radius? measurement
- From which mission or study? provenance
Composition
Rock, ice, gas.
Composition
Composition.
- What is it made of? measurement
- How certain is that? boundary
Rogue planets Free-floating.
Detection
Methods.
Detection
Detection.
- How are free-floating planets detected? definition
- How many are known? measurement
Boundary
Brown dwarfs.
Boundary
Mass boundary.
- Is it below the brown dwarf limit? boundary
- How is the limit defined? definition
Debate Definitions.
Views
Geophysical vs IAU.
Views
Definitional views.
- How do geophysical and IAU definitions differ? definition
- Who argues for each? provenance
Communication
Clarity.
Communication
Clear explanation.
- How can the class be explained simply? action
- Which confusions are common? boundary
Classifiers Filled
- Family
- Thing Registry
- Domain
- PHY.SPC
What it is Filled
A celestial body massive enough to have become nearly round under its own gravity but not massive enough to sustain nuclear fusion; includes planets, dwarf planets, large moons and free-floating planetary-mass objects.
Why it exists Filled
Let an agent handle planetary-mass objects as a geophysical class spanning planets, dwarf planets and large moons, with sourced data.
Distinguishing features Filled
- Round from self-gravity
- No fusion
- Cuts across orbital classes
- Includes free-floating objects
What robots and AI may and may not do Derived, awaiting review
May
- classify bodies by shape and mass
- compare planets, moons and dwarf planets
- study rogue planets
- follow classification debates
Note: Affordances listed as what may be done; prohibitions collected from the text.
Moral aspects Missing, in the backlog
Not described yet. This gap is in the card backlog.
Owners Missing, in the backlog
Not described yet. This gap is in the card backlog.
Links to other meta-models Filled
related
- planet, dwarf planet - members
- brown dwarf and star - fusing bodies
- planetary science - field
- planetary body - category
What else AI and robots need to interact with it Incomplete
Identity and identifiers required Missing, in the backlog
Not described yet. This gap is in the card backlog.
Direct properties required Filled
- lower mass limit: enough for hydrostatic equilibrium mass - depends on composition
- upper mass limit: about 13 Jupiter masses - deuterium fusion threshold
Recognition required Filled
- Nearly round shape
- Includes moons such as Titan
- Brown dwarfs are more massive
- Round worlds of rock, ice or gas.
Capabilities and actions required Filled
- classify bodies by shape and mass
- compare planets, moons and dwarf planets
- study rogue planets
- follow classification debates
Hazards and failure modes required Filled
- Mixing geophysical and IAU definitions
- Overstating shape data for distant bodies
Standards and interfaces required Filled
- IAU definitions (orbital); geophysical usage varies
Context of use required Filled
- A physical classification used in planetary science.
- planets
- dwarf planets
- planetary-mass moons
- free-floating (rogue) planets
Sources Missing, in the backlog
Not described yet. This gap is in the card backlog.
Note: Written from model knowledge without web access; claims are unverified.
Open questions
- Should rogue planets be a separate entry?
- How should shape measurements be linked?
- How should definitions be compared?
- How can the class be explained simply?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q400144/spec.json