Published
parallax
vr.tr.parallax · thing-parallax
Let an agent handle parallax by type, geometry, measurement and applications, including parallax error.
Thing Registry Physical world and living systems PHY.FLW
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Type Which parallax.
Kind
Stellar, diurnal, stereo.
Kind
Parallax type.
- Which kind of parallax is meant? definition
- What is the baseline? measurement
Geometry
Triangle.
Geometry
Geometry.
- How does the geometry give distance? definition
- What small-angle approximation is used? definition
Astronomy Stellar distances.
Value
Parallax angle.
Value
Parallax value.
- What is the star parallax and its uncertainty? measurement
- From which catalogue? provenance
Distance
Conversion.
Distance
Distance.
- What distance does the parallax imply? measurement
- Is simple inversion valid at this uncertainty? boundary
Measurement Parallax error.
Error
Instruments.
Error
Parallax error.
- Is the scale read straight on to avoid parallax error? action
- Does the instrument have a mirror strip? definition
Stereo
Depth.
Stereo
Stereo depth.
- How is parallax used in stereo imaging or vision? definition
- What baseline is needed? measurement
Learning Teaching.
Demonstration
Thumb test.
Demonstration
Demonstration.
- How can parallax be demonstrated simply? action
- What does it show? definition
History
First measurements.
History
History.
- When was stellar parallax first measured, according to historians? provenance
- Why did it matter? definition
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- noun.phenomenon
- Plane
- PHY
- Domain
- PHY.FLW
- Facets: substance
- energy
- Facets: origin
- natural
- Facets: agency
- inert
- Facets: mobility
- not-applicable
- Facets: scale
- not-applicable
- Facets: affordances
- observable
- Other names and narrower kinds
- heliocentric parallax, annual parallax, stellar parallax, geocentric parallax, diurnal parallax, horizontal parallax, solar parallax
What it is Filled
The apparent displacement of an object when viewed from two different positions not on a line with the object, used to measure distances, as in stellar (annual) parallax, diurnal parallax and stereo vision; also a source of error in reading instruments.
Why it exists Filled
Let an agent handle parallax by type, geometry, measurement and applications, including parallax error.
Distinguishing features Filled
- Apparent shift from changing viewpoint
- Larger for nearer objects
- Basis of the parsec
- Also an instrument reading error
What robots and AI may and may not do Filled
Must not
- Report an instrument reading taken at an angle without correcting or flagging parallax error.
- Present uncertain parallax distances as precise.
Only with a human decision
- Relying on a parallax-based measurement for safety-critical work.
May
- Explain parallax and use it to calculate distances with stated uncertainty.
- Warn users about parallax error when reading instruments.
Moral aspects Filled
- Reading errors can lead to wrong doses or settings.
- Distance scales in astronomy depend on careful measurement.
Who is affected
- People relying on instrument readings
- Researchers
Owners Filled
Steward
Nobody: a physical phenomenon held in common.
Master systems
- Astrometric star catalogues
Links to other meta-models Filled
parent
- oewn-11511038-n - registry parent class
related
- optical phenomenon - category
- distance - quantity
- parsec - unit
- astrometry missions - instruments
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.parallax
- Open English WordNet: oewn-11548676-n
Direct properties required Filled
- parsec: about 3.26 light-years - distance at 1 arcsecond parallax
Recognition required Filled
- Parallax angles in arcseconds
- Parsec defined by parallax
- Parallax error on dial gauges
- An apparent shift of a nearby object against a distant background.
Capabilities and actions required Filled
- compute distances from parallax angles
- avoid parallax error when reading scales
- use stereo imaging
- look up stellar parallaxes
Hazards and failure modes required Filled
- Reading gauges from an angle
- Ignoring measurement uncertainty for distant stars
Standards and interfaces required Filled
- IAU definition of the parsec
Context of use required Filled
- Measuring distances to stars and objects, and depth perception.
- stellar (annual) parallax
- diurnal parallax
- binocular and stereo parallax
- parallax error in measurement
Sources Filled
- Open English WordNet 2024, synset oewn-11548676-n - sense and gloss of the concept
- Wiktionary: parallax - word senses and usage
Open questions
- Should parallax types be separate entries?
- How should astrometry catalogues be linked?
- How should parallax error guidance be linked?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-parallax/spec.json