ScaleTrip

Travel through scale.

ScaleTrip scientific reference data

Inspect definitions and review status for 125 scale references, with sourced values, CSV and JSON downloads, provenance and reproducible methods.

Read a number like a labelled ingredient

“80” alone tells us little. “Hair width, 80 µm, a chosen example” tells us what the number means and how we can use it.

  1. Name the length

    Earth–Moon distance: from one centre to the other. Hair: width across a strand, not its full length.

  2. Use one unit

    80 µm = 80,000 nm; DNA ≈ 2 nm

    A smaller unit needs a larger number to describe the same length.

  3. Calculate, then explain

    80,000 ÷ 2 = 40,000

    The chosen hair width is about 40,000 DNA widths. Different hair widths give different answers.

A dash in the download means a value is withheld while evidence is reviewed. It does not mean zero. The catalogue below keeps sources, definitions and review status beside each entry.

Reuse the comparison, keep its definition

This catalogue inventories all 125 existing entries: 71 Macro and 54 Micro. 32 numeric entries below are typed as source-supported values, calculations, defined markers or chosen illustrative assumptions. The remaining 93 entries have a documented review status and a null value, so an unresolved comparison cannot silently become a verified measurement.

ScaleTrip curates and calculates from published evidence. The original contribution is the documented comparison, not ownership of the underlying measurement. No independent expert certification is claimed.

Dataset content version: 8bb5fc4729cd. Reproduce the methods

Released numeric records

21 source-supported or source-derived values, 9 defined unit markers, and 2 chosen illustrative assumptions are released. These categories are different: the numeric total is not a count of verified physical measurements.

An exact marker is not an exactly known object. A chosen hair diameter is not a population mean. Keep verificationStatus and scientificCaveat with every reuse.

Lengths and evidence roles (metres)
ReferenceSI valueStatus
Basketball court2.8e+1 mSource claim checked
Eiffel Tower3.3e+2 mSource claim checked
Burj Khalifa8.28e+2 mSource claim checked
One kilometre1e+3 mExact defined scale marker
Golden Gate main span1.28e+3 mSource claim checked
Marathon4.2195e+4 mSource claim checked
Earth radius6.371e+6 mSource claim checked
Earth diameter1.2742e+7 mCalculated from a sourced value
Geostationary orbit3.5786e+7 mSource claim checked
Earth circumference4.0075e+7 mSource claim checked
Earth–Moon distance3.844e+8 mSource claim checked
Sun radius6.96e+8 mCalculated from a sourced value
Sun diameter1.392e+9 mCalculated from a sourced value
Venus orbit1.082e+11 mCalculated from a sourced value
Earth–Sun distance1.496e+11 mCalculated from a sourced value
Mars orbit2.279e+11 mCalculated from a sourced value
Saturn orbit1.43e+12 mCalculated from a sourced value
Neptune orbit4.5e+12 mCalculated from a sourced value
One metre1e+0 mExact defined scale marker
Ten centimetres1e-1 mExact defined scale marker
One centimetre1e-2 mExact defined scale marker
One millimetre1e-3 mExact defined scale marker
Human hair8e-5 mChosen comparison assumption
Red blood cell7.5e-6 mChosen comparison assumption
One micrometre1e-6 mExact defined scale marker
DNA double helix2e-9 mSource claim checked
One nanometre1e-9 mExact defined scale marker
Hydrogen atom1.06e-10 mCalculated from a sourced value
One ångström1e-10 mExact defined scale marker
One femtometre1e-15 mExact defined scale marker
Proton charge radius8.4075e-16 mSource claim checked
CMS experimental frontier1e-20 mSource claim checked

Basketball court

macro:basketball · 2.8e+1 m · Source claim checked

Measurement definition
FIBA inner playing-area length, 28.0 m.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
FIBA Venue Guide — Court flooring ·
Scientific caveat
Length, not ball diameter. Excludes the at-least-2 m boundary on each end; the full court area is at least 32 m long.

Eiffel Tower

macro:eiffel · 3.3e+2 m · Source claim checked

Measurement definition
Operator-listed current total tower height, 330 m.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
Eiffel Tower operator — Chiffres clés ·
Scientific caveat
Total current height, not an observation-floor elevation or the original height without an antenna.

Burj Khalifa

macro:burj · 8.28e+2 m · Source claim checked

Measurement definition
Architectural height from the lowest significant open-air pedestrian entrance to the architectural top, 828 m.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
Council on Vertical Urbanism / CTBUH — Burj Khalifa ·
Scientific caveat
Includes the architectural spire, excludes functional antennae. Distinguish the separately listed 829.8 m tip height and 584.5 m highest occupied floor.

One kilometre

macro:one-km · 1e+3 m · Exact defined scale marker

Measurement definition
The defined length 1 kilometre = 1,000 metres.
Uncertainty / range
Definition, not a zero-uncertainty physical measurement.
Source / recorded review
NIST — Metric (SI) prefixes ·
Scientific caveat
An exact unit relation, not a measurement of a road.

Golden Gate main span

macro:golden-gate · 1.28e+3 m · Source claim checked

Measurement definition
Main suspension span between supports, listed as 1,280 m (4,200 ft).
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
Golden Gate Bridge District — Facts & Figures ·
Scientific caveat
Rounded main span, not the 2,737 m total bridge length including approaches. The two listed units are rounded, not an exact equality.

Marathon

macro:marathon · 4.2195e+4 m · Source claim checked

Measurement definition
Official marathon race distance, 42.195 km.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
World Athletics — Marathon ·
Scientific caveat
A standardized course length; course certification and an athlete’s path require separate measurement.

Earth radius

macro:earth-radius · 6.371e+6 m · Source claim checked

Measurement definition
Volumetric mean radius, rounded from JPL’s 6,371.0084 km to the existing 6,371 km comparison.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
NASA JPL — Planetary Physical Parameters ·
Scientific caveat
Equivalent-volume sphere; flattening, terrain and local radius differ.

Earth diameter

macro:earth-diameter · 1.2742e+7 m · Calculated from a sourced value

Measurement definition
Twice the rounded volumetric mean radius: 2 × 6,371 km.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
NASA JPL — Planetary Physical Parameters ·
Scientific caveat
A spherical mean diameter, rather than equatorial or polar diameter.

Geostationary orbit

macro:geo-orbit · 3.5786e+7 m · Source claim checked

Measurement definition
Approximate geostationary altitude above Earth’s equator, 35,786 km.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
European Space Agency — Types of orbits ·
Scientific caveat
Altitude above the surface, not orbital radius from Earth’s centre.

Earth circumference

macro:earth-circumference · 4.0075e+7 m · Source claim checked

Measurement definition
Approximate equatorial circumference, 40,075 km.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
NOAA GEONETCast — WGS 84 equatorial calculation ·
Scientific caveat
Equatorial, not a meridian circumference; the mean-radius sphere has a different circumference.

Earth–Moon distance

macro:earth-moon · 3.844e+8 m · Source claim checked

Measurement definition
Approximate mean centre-to-centre Earth–Moon separation.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
NASA Space Place — Moon distance ·
Scientific caveat
Distance varies over time; use an ephemeris for a date-specific separation.

Sun radius

macro:sun-radius · 6.96e+8 m · Calculated from a sourced value

Measurement definition
Comparison derived from the nominal solar radius: 695,700 km → 696,000 km.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
IAU 2015 Resolution B3 — Nominal Solar Conversion Constants ·
Scientific caveat
The IAU nominal radius is an exact conversion constant, not the true instantaneous solar radius. This comparison rounds it first; the diameter doubles that rounded radius.

Sun diameter

macro:sun-diameter · 1.392e+9 m · Calculated from a sourced value

Measurement definition
Comparison derived from the nominal solar radius: 2 × 696,000 km = 1,392,000 km.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
IAU 2015 Resolution B3 — Nominal Solar Conversion Constants ·
Scientific caveat
The IAU nominal radius is an exact conversion constant, not the true instantaneous solar radius. This comparison rounds it first; the diameter doubles that rounded radius.

Venus orbit

macro:venus-orbit · 1.082e+11 m · Calculated from a sourced value

Measurement definition
J2000 orbital semimajor axis: 0.72333566 au × 149,597,870.7 km/au, rounded to 4 significant digits.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
NASA JPL — Approximate Positions, Table 1 (J2000) ·
Scientific caveat
An approximate heliocentric orbital scale, not today’s separation from Earth or a planet radius. The source model has a stated validity interval.

Earth–Sun distance

macro:earth-sun · 1.496e+11 m · Calculated from a sourced value

Measurement definition
Rounded 1 au comparison length: 149,597,870,700 m becomes 149,600,000,000 m.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
NIST SP 330 — Astronomical unit ·
Scientific caveat
The au is an exact unit; this rounded comparison is approximate. Date-specific Earth–Sun separation varies.

Mars orbit

macro:mars-orbit · 2.279e+11 m · Calculated from a sourced value

Measurement definition
J2000 orbital semimajor axis: 1.52371034 au × 149,597,870.7 km/au, rounded to 4 significant digits.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
NASA JPL — Approximate Positions, Table 1 (J2000) ·
Scientific caveat
An approximate heliocentric orbital scale, not today’s separation from Earth or a planet radius. The source model has a stated validity interval.

Saturn orbit

macro:saturn-orbit · 1.43e+12 m · Calculated from a sourced value

Measurement definition
J2000 orbital semimajor axis: 9.53667594 au × 149,597,870.7 km/au, rounded to 3 significant digits.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
NASA JPL — Approximate Positions, Table 1 (J2000) ·
Scientific caveat
An approximate heliocentric orbital scale, not today’s separation from Earth or a planet radius. The source model has a stated validity interval.

Neptune orbit

macro:neptune-orbit · 4.5e+12 m · Calculated from a sourced value

Measurement definition
J2000 orbital semimajor axis: 30.06992276 au × 149,597,870.7 km/au, rounded to 2 significant digits.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
NASA JPL — Approximate Positions, Table 1 (J2000) ·
Scientific caveat
An approximate heliocentric orbital scale, not today’s separation from Earth or a planet radius. The source model has a stated validity interval.

One metre

micro:one-metre · 1e+0 m · Exact defined scale marker

Measurement definition
A defined length marker in metres, not an observation of an object.
Uncertainty / range
Definition, not a zero-uncertainty physical measurement.
Source / recorded review
NIST — Metric (SI) prefixes ·
Scientific caveat
Exact unit relation only; artwork conveys context.

Ten centimetres

micro:ten-centimetres · 1e-1 m · Exact defined scale marker

Measurement definition
A defined length marker in metres, not an observation of an object.
Uncertainty / range
Definition, not a zero-uncertainty physical measurement.
Source / recorded review
NIST — Metric (SI) prefixes ·
Scientific caveat
Exact unit relation only; artwork conveys context.

One centimetre

micro:one-centimetre · 1e-2 m · Exact defined scale marker

Measurement definition
A defined length marker in metres, not an observation of an object.
Uncertainty / range
Definition, not a zero-uncertainty physical measurement.
Source / recorded review
NIST — Metric (SI) prefixes ·
Scientific caveat
Exact unit relation only; artwork conveys context.

One millimetre

micro:one-millimetre · 1e-3 m · Exact defined scale marker

Measurement definition
A defined length marker in metres, not an observation of an object.
Uncertainty / range
Definition, not a zero-uncertainty physical measurement.
Source / recorded review
NIST — Metric (SI) prefixes ·
Scientific caveat
Exact unit relation only; artwork conveys context.

Human hair

micro:human-hair · 8e-5 m · Chosen comparison assumption

Measurement definition
Chosen 80 µm cross-section diameter for comparison; not a study or population mean.
Uncertainty / range
0.00005–0.0001 m. Illustrative band, not population bounds or a confidence interval.
Source / recorded review
van den Berg et al. — Human hair cross-sections, Tables 4–5 ·
Scientific caveat
Tables 4–5 distinguish major/minor axes. The 50–100 µm display band is illustrative; strands can lie outside it.

Red blood cell

micro:red-blood-cell · 7.5e-6 m · Chosen comparison assumption

Measurement definition
Chosen 7.5 µm representative diameter; the cited study reports a 7.65 µm sample mean.
Uncertainty / range
0.000006–0.000008 m. Illustrative band, not population bounds or a confidence interval.
Source / recorded review
Fung, Tsang & Patitucci (1981) — Red blood cell geometry (abstract) ·
Scientific caveat
Publisher abstract reviewed, not full text. Study SEM 0.05 µm differs from SD 0.67 µm. Display band 6–8 µm is illustrative.

One micrometre

micro:one-micrometre · 1e-6 m · Exact defined scale marker

Measurement definition
A defined length marker in metres, not an observation of an object.
Uncertainty / range
Definition, not a zero-uncertainty physical measurement.
Source / recorded review
NIST — Metric (SI) prefixes ·
Scientific caveat
Exact unit relation only; artwork conveys context.

DNA double helix

micro:dna · 2e-9 m · Source claim checked

Measurement definition
Approximate DNA double-helix diameter (NHGRI transcript question 296).
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
NHGRI — DNA Day transcript, question 296 ·
Scientific caveat
A transverse diameter, rather than the total length of a DNA molecule.

One nanometre

micro:one-nanometre · 1e-9 m · Exact defined scale marker

Measurement definition
A defined length marker in metres, not an observation of an object.
Uncertainty / range
Definition, not a zero-uncertainty physical measurement.
Source / recorded review
NIST — Metric (SI) prefixes ·
Scientific caveat
Exact unit relation only; artwork conveys context.

Hydrogen atom

micro:hydrogen-atom · 1.06e-10 m · Calculated from a sourced value

Measurement definition
2a₀, rounded to 1.06 × 10⁻¹⁰ m; 2022 CODATA a₀ = 5.29177210544 × 10⁻¹¹ m.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
NIST — 2022 CODATA, Bohr radius (PDF page 45) ·
Scientific caveat
Twice the Bohr radius is a chosen atomic length convention. It is not a hard edge or every atom’s diameter.

One ångström

micro:angstrom · 1e-10 m · Exact defined scale marker

Measurement definition
A defined length marker in metres, not an observation of an object.
Uncertainty / range
Definition, not a zero-uncertainty physical measurement.
Source / recorded review
NIST SP 811 — Appendix B.8, ångström ·
Scientific caveat
Exact unit relation only; artwork conveys context.

One femtometre

micro:one-femtometre · 1e-15 m · Exact defined scale marker

Measurement definition
A defined length marker in metres, not an observation of an object.
Uncertainty / range
Definition, not a zero-uncertainty physical measurement.
Source / recorded review
NIST — Metric (SI) prefixes ·
Scientific caveat
Exact unit relation only; artwork conveys context.

Proton charge radius

micro:proton · 8.4075e-16 m · Source claim checked

Measurement definition
2022 CODATA root-mean-square radius of the proton charge distribution.
Uncertainty / range
u = 6.4e-19 m. Published standard uncertainty for this measured estimate; not a specimen range.
Source / recorded review
NIST — 2022 CODATA (PDF page 47) ·
Scientific caveat
RMS charge radius; not a hard-sphere radius or diameter. Standard uncertainty is 0.00064 fm.

CMS experimental frontier

micro:cms-frontier · 1e-20 m · Source claim checked

Measurement definition
Order-of-magnitude substructure exclusion length in the model discussed by CMS.
Uncertainty / range
Not quantified here; null is not zero uncertainty.
Source / recorded review
CMS — What is inside quarks? CMS looks deeper (7 April 2026) ·
Scientific caveat
Model-dependent experimental bound, not a measured quark size. Publication context: 7 April 2026.

Review queue: values withheld

All references stay in the existing visualizers. A general source or a default min=max is insufficient to establish a particular number or its uncertainty. These records are inventoried, not silently certified.

Inspect 93 records and candidate sources
  • Adult height macro:adult

    Value withheld pending review · Primary source needed

  • Standard door macro:door

    Value withheld pending review · Primary source needed

  • Passenger car macro:car

    Value withheld pending review · Primary source needed

  • City bus macro:bus

    Value withheld pending review · Primary source needed

  • Bowling lane macro:bowling

    Value withheld pending review · Primary source needed

  • Blue whale macro:blue-whale

    Value withheld pending review · Primary source needed

  • Boeing 737 macro:boeing-737

    Value withheld pending review · Primary source needed

  • Olympic pool macro:olympic-pool

    Value withheld pending review · Primary source needed

  • Statue of Liberty macro:statue-liberty

    Value withheld pending review · Primary source needed

  • 100-metre sprint macro:hundred-meter

    Value withheld pending review · Primary source needed

  • Football pitch macro:football

    Value withheld pending review · Primary source needed

  • Great Pyramid macro:great-pyramid

    Value withheld pending review · Primary source needed

  • Washington Monument macro:washington

    Value withheld pending review · Primary source needed

  • 63 Building macro:63-building

    Value withheld pending review · Primary source needed

  • Empire State Building macro:empire

    Value withheld pending review · Primary source needed

  • Lotte World Tower macro:lotte

    Value withheld pending review · Primary source needed

  • Akashi Kaikyo main span macro:akashi

    Value withheld pending review · Primary source needed

  • Airport runway macro:airport-runway

    Value withheld pending review · Primary source needed

  • Mount Fuji macro:fuji

    Value withheld pending review · Primary source needed

  • Central Park macro:central-park

    Value withheld pending review · Primary source needed

  • Mount Everest macro:everest

    Value withheld pending review · Primary source needed

  • Strait of Gibraltar macro:gibraltar

    Value withheld pending review · Primary source needed

  • Manhattan macro:manhattan

    Value withheld pending review · Primary source needed

  • English Channel crossing macro:channel-width

    Value withheld pending review · Primary source needed

  • Singapore macro:singapore

    Value withheld pending review · Primary source needed

  • Channel Tunnel macro:channel-tunnel

    Value withheld pending review · Primary source needed

  • Seoul–Daejeon macro:seoul-daejeon

    Value withheld pending review · Primary source needed

  • Taiwan width macro:taiwan-width

    Value withheld pending review · Primary source needed

  • Seoul–Busan macro:seoul-busan

    Value withheld pending review · Primary source needed

  • London–Paris macro:london-paris

    Value withheld pending review · Primary source needed

  • Tokyo–Osaka macro:tokyo-osaka

    Value withheld pending review · Primary source needed

  • South Korea macro:korea-height

    Value withheld pending review · Primary source needed

  • Los Angeles–San Francisco macro:la-sf

    Value withheld pending review · Primary source needed

  • Great Britain macro:uk-height

    Value withheld pending review · Primary source needed

  • Korean Peninsula macro:peninsula

    Value withheld pending review · Primary source needed

  • Seoul–London macro:seoul-london

    Value withheld pending review · Primary source needed

  • Close Earth–Mars distance macro:mars-close

    Value withheld pending review · Primary source needed

  • Jupiter orbit macro:jupiter-orbit

    Value withheld pending review · Primary source needed

  • Distance to the heliopause macro:heliopause

    Value withheld pending review · Primary source needed

  • Inner Oort Cloud macro:oort-inner

    Value withheld pending review · Primary source needed

  • Outer Oort Cloud macro:oort-outer

    Value withheld pending review · Primary source needed

  • Alpha Centauri system macro:alpha-centauri

    Value withheld pending review · Primary source needed

  • Barnard's Star macro:barnards-star

    Value withheld pending review · Primary source needed

  • Sirius macro:sirius

    Value withheld pending review · Primary source needed

  • Vega macro:vega

    Value withheld pending review · Primary source needed

  • Pleiades star cluster macro:pleiades

    Value withheld pending review · Primary source needed

  • Milky Way disk diameter macro:milky-way

    Value withheld pending review · Primary source needed

  • Distance to the Large Magellanic Cloud macro:large-magellanic

    Value withheld pending review · Primary source needed

  • Distance to the Andromeda Galaxy macro:andromeda

    Value withheld pending review · Primary source needed

  • Local Group diameter macro:local-group

    Value withheld pending review · Primary source needed

  • Distance to the Virgo Cluster macro:virgo-cluster

    Value withheld pending review · Primary source needed

  • Laniakea Supercluster scale macro:laniakea

    Value withheld pending review · Primary source needed

  • Observable universe diameter macro:observable-universe

    Value withheld pending review · Primary source needed

  • Human upper body micro:upper-body

    Value withheld pending review · Primary source needed

  • 30 cm ruler micro:ruler

    Value withheld pending review · Primary source needed

  • Golf ball micro:golf-ball

    Value withheld pending review · Primary source needed

  • Coin micro:coin

    Value withheld pending review · Primary source needed

  • Five millimetres micro:five-millimetres

    Conceptual marker; value withheld · Primary source needed

  • Grain of rice width micro:rice-width

    Value withheld pending review · Primary source needed

  • Coarse sand grain micro:coarse-sand

    Value withheld pending review · Primary source needed

  • Fine sand grain micro:fine-sand

    Value withheld pending review · Primary source needed

  • Pollen grain micro:pollen

    Value withheld pending review · Primary source needed

  • Typical human cell micro:human-cell

    Value withheld pending review · NCBI Bookshelf — Viruses and Cells

  • White blood cell micro:white-blood-cell

    Value withheld pending review · NCBI Bookshelf — Viruses and Cells

  • Yeast cell micro:yeast

    Value withheld pending review · Primary source needed

  • Bacterium micro:bacterium

    Value withheld pending review · NCBI Bookshelf — Viruses and Cells

  • Mitochondrion micro:mitochondrion

    Value withheld pending review · Primary source needed

  • Visible-light wavelength micro:visible-light

    Conceptual marker; value withheld · Primary source needed

  • Poxvirus micro:poxvirus

    Value withheld pending review · NCBI Bookshelf — Viruses and Cells

  • Bacteriophage micro:bacteriophage

    Value withheld pending review · Primary source needed

  • Influenza virion micro:influenza

    Value withheld pending review · NCBI Bookshelf — Viruses and Cells

  • Small virus micro:small-virus

    Value withheld pending review · NCBI Bookshelf — Viruses and Cells

  • Ribosome micro:ribosome

    Value withheld pending review · Primary source needed

  • Nucleosome micro:nucleosome

    Value withheld pending review · Primary source needed

  • Antibody micro:antibody

    Value withheld pending review · Primary source needed

  • Cell membrane micro:cell-membrane

    Value withheld pending review · Primary source needed

  • Folded protein micro:protein

    Value withheld pending review · Primary source needed

  • Glucose molecule micro:glucose

    Value withheld pending review · Primary source needed

  • C₆₀ fullerene micro:fullerene

    Value withheld pending review · Primary source needed

  • Small molecule micro:small-molecule

    Value withheld pending review · Primary source needed

  • Water molecule micro:water

    Value withheld pending review · Primary source needed

  • Crystal lattice spacing micro:lattice-spacing

    Value withheld pending review · Primary source needed

  • Typical atom micro:typical-atom

    Value withheld pending review · NIST — Highly Charged Ions

  • Inner electron region micro:inner-electron

    Conceptual marker; value withheld · Primary source needed

  • Hard X-ray wavelength micro:hard-xray

    Conceptual marker; value withheld · Primary source needed

  • Nuclear transition scale micro:nuclear-transition

    Conceptual marker; value withheld · Primary source needed

  • Lead nucleus micro:lead-nucleus

    Value withheld pending review · Primary source needed

  • Carbon nucleus micro:carbon-nucleus

    Value withheld pending review · Primary source needed

  • Alpha particle micro:alpha-particle

    Value withheld pending review · Primary source needed

  • Strong-force range micro:strong-force

    Conceptual marker; value withheld · Primary source needed

  • Sub-femtometre interactions micro:sub-femtometre

    Conceptual marker; value withheld · Primary source needed

  • Electroweak interaction scale micro:weak-scale

    Conceptual marker; value withheld · Primary source needed

  • HERA quark-radius bound micro:hera-quark-bound

    Value withheld pending review · CERN Indico — HERA quark radius limits

Data dictionary

identifier
Stable mode-prefixed identifier (macro:… or micro:…).
name.en / name.ko
English and Korean names for the same record.
valueSi / siUnit
Length in metres; null means withheld pending evidence review. CSV uses an empty field for null.
physicalDimension
All catalogue values have dimension length (L). Sharing a dimension does not make definitions interchangeable.
measurementDefinition / measurementType
Named endpoints, axis, radius/diameter convention or experimental constraint.
valueStatus
Exact definition, approximate mean, rounded derived length, chosen representative or experimental bound.
verificationStatus
Source-supported, derived, illustrative assumption, defined marker, conceptual-only or needs-verification. A URL alone is not validation.
uncertainty.kind
Standard uncertainty, illustrative display band, exact definition, or not quantified.
uncertainty.standardUncertaintySi
Standard uncertainty in metres when established. Null is not zero.
uncertainty.lowerSi / upperSi
Here these bounds are illustrative hair/cell display bands, not confidence intervals or universal limits.
sourceUrl / sourceTitle / sourceCheckDate
Primary evidence and the recorded evidence-review date, not a measurement date or peer-review credential. Null when not checked.
scientificCaveat
Limits of the measurement and evidence; retained in both languages and CSV.
version
Content fingerprint of all records; reproducible downloads retain this identifier.

Provenance, licensing and citation

Source of the catalogue: the maintained Macro and Micro production data. Compilation, SI conversion, status labels and explanations are authored by ScaleTrip. Original sources remain credited per record. A review date describes the evidence checked, not when an object was measured; the version changes only when catalogue content changes.

Creative Commons Attribution 4.0 International (CC BY 4.0): applies to ScaleTrip-authored explanations, selection, arrangement and calculation documentation, to the extent rights apply. Attribute ScaleTrip / fixuncomfortable.com, link the licence and indicate changes. Third-party publications, illustrations, software, maps and trademarks retain their own terms. Scientific facts remain facts; this licence does not claim exclusive ownership of them.

Suggested citation: ScaleTrip (fixuncomfortable.com), Reference catalogue and reviewed comparison values, version 8bb5fc4729cd, https://scaletrip.site/en/data/. Add your actual access date. Cite the linked primary source for the original measurement.

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