20 kilometres
20 kmLength · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Length & distance
Just how long is 20 kilometres?
Our planet
20 km
20,000 mmetres
65,617 ftfeet
12.427 mimiles
1.3369 × 10⁻⁷ AUastronomical units
01
20 kilometres20 kmLength · definition
02
Neutron star20 kmDiameter · representative
Both marked spans share one linear scale. Artwork keeps its proportions; poses and surface detail are illustrative.
A little perspective
The length of 20 kilometres and the diameter of Neutron star are approximately the same.
Measurements, assumptions & sources +
20 kilometres
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Neutron star
A 20 km, 1.4 solar-mass teaching model. The precise radius depends on stellar mass and the uncertain behaviour of dense matter.
The marked diameter is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
The visual compares length with diameter. The records below preserve each value’s basis and caveats.
Neutron star
20 kmDiameter · representative
A 20 km, 1.4 solar-mass teaching model. The precise radius depends on stellar mass and the uncertain behaviour of dense matter.
- Comparing
- Length ↔ Diameter
- Relative size
- The two selected measurements are approximately equal.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- Neutron star is labelled representative; treat the displayed value as a comparison anchor rather than false precision.
Change your perspective
Put it next to…
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
A little smaller. A little larger.