1 light-hour
7.214 AULength · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Length & distance
Just how long is 1 light-hour?
Solar neighbourhood
1 light-h
1.0793 × 10¹² mmetres
3.5409 × 10¹² ftfeet
670,620,000 mimiles
7.2144 AUastronomical units
01
1 light-hour7.214 AULength · definition
02
Betelgeuse6.511 AUDiameter · rounded model
Both marked spans share one linear scale. Artwork keeps its proportions; poses and surface detail are illustrative.
A little perspective
The length of 1 light-hour is about 1.11 times the diameter of Betelgeuse.
Measurements, assumptions & sources +
1 light-hour
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Betelgeuse
A deliberately rounded red-supergiant model. Its apparent edge varies with wavelength and the star changes over time.
Defined examples — our methodology
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.
Betelgeuse
6.511 AUDiameter · rounded model
A deliberately rounded red-supergiant model. Its apparent edge varies with wavelength and the star changes over time.
- Comparing
- Length ↔ Diameter
- Relative size
- 1 light-hour is larger on this measurement by a factor of about 1.11. 1 light-hour's selected measurement is approximately 10.8% greater than Betelgeuse's.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- Betelgeuse is labelled rounded model; 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.