One-hour cycle
A one-hour cycle is the distance covered by cycling at a constant speed for one hour without stopping.
How big is it?
20 km away
Also 12.43 mi
Distance · example
A little perspective
About the same scale as Neutron star.
Neutron star: A neutron star is the dense remnant core left after a massive star explodes as a supernova, composed mostly of neutrons.
Measurements, assumptions & sources +
One-hour cycle
Distance at a constant 20 km/h for one hour. Terrain and rider ability vary.
Defined examples — our methodology
The marked distance is calibrated. Unmeasured illustration details are representative.
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.
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Why this measurement?
Why we use 20 km
For comparison, this page uses distance. This is labelled example: an explicit comparison model rather than a claim that every example has the same value.
Distance at a constant 20 km/h for one hour. Terrain and rider ability vary.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
One-hour cycle dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 20 km | Not recorded | example |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · SpaceAdrastea16.4 kmAdrastea is a small, irregular inner moon of Jupiter, located just outside the planet's main ring.
Around the same scale · SpaceNeutron star20 kmA neutron star is the dense remnant core left after a massive star explodes as a supernova, composed mostly of neutrons.
Nearest higher value · SpacePhobos22.53 kmPhobos is the larger and innermost moon of Mars, notable for its irregular shape and heavily cratered surface.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
There’s always another scale
Follow your curiosity.
SpaceNeutron star20 kmA neutron star is the dense remnant core left after a massive star explodes as a supernova, composed mostly of neutrons.SpacePhobos22.53 kmPhobos is the larger and innermost moon of Mars, notable for its irregular shape and heavily cratered surface.PlacesChallenger Deep10.94 kmChallenger Deep is the deepest known point in the Earth's oceans, located in the Mariana Trench.
SpaceDeimos12.4 kmDeimos is the smaller and outermost natural satellite of Mars, with an irregular, rocky shape.
Places100 km² island100 km²An island is a landmass entirely surrounded by water.PeopleOne-hour walk5 kmA one-hour walk is the distance a person travels by walking continuously at a steady pace for one hour.TransportOne-hour drive at 100 km/h100 kmA one-hour drive at a set speed is the distance a vehicle travels in one hour of uninterrupted motion.Built world3 km runway3 kmA runway is a paved strip at an airport where aircraft take off and land.