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 light-hour
The quantity is exact as entered.
7.214 AULength
0 - shared origin
Betelgeuse
Betelgeuse is a red supergiant star in the constellation Orion that changes in brightness over time.
6.511 AUDiameter
0 - shared origin
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. A ruler represents the selected distance or a measurement not visible in this view.
A little perspective
1 light-hour is about 1.11 times the diameter of Betelgeuse.
Measurements, assumptions & sources +
1 light-hour
Length: 7.214 AU; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Betelgeuse
Diameter: 6.511 AU; rounded model.
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?
Compare 1 light-hour with the diameter of Betelgeuse. The notes below explain how each value was chosen.
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 about 1.11 times the diameter of Betelgeuse. 1 light-hour is approximately 10.8% greater than the diameter of Betelgeuse.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- The diameter of Betelgeuse: This is an illustrative comparison value, not a claim that every example is the same.
This comparison follows the selected length only; other dimensions may differ.
1.0793 × 10¹² mmetres
3.5409 × 10¹² ftfeet
670,620,000 mimiles
7.2144 AUastronomical units
Change your perspective
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A little smaller. A little larger.