100 light-years
100 lyLength · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Length & distance
Just how long is 100 light-years?
Deep space
100 ly
100 light-years
The quantity is exact as entered.
100 lyLength
0 - shared origin
Distance to Sirius
This is the distance from the Sun to Sirius, the brightest star in the night sky.
8.6 lyDistance
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
100 light-years is about 11.6 times the distance to Sirius.
Measurements, assumptions & sources +
100 light-years
Length: 100 ly; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Distance to Sirius
Distance: 8.6 ly; rounded reference.
A rounded 8.6 light-year distance example for the bright nearby star.
Defined examples — our methodology
The marked distance is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 100 light-years with the distance to Sirius. The notes below explain how each value was chosen.
Distance to Sirius
8.6 lyDistance · rounded reference
A rounded 8.6 light-year distance example for the bright nearby star.
- Comparing
- Length ↔ Distance
- Relative size
- 100 light-years is about 11.6 times the distance to Sirius.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- The distance to Sirius: This is a rounded comparison value; check the notes for its source and scope.
This comparison follows the selected length only; other dimensions may differ.
9.4607 × 10¹⁷ mmetres
3.1039 × 10¹⁸ ftfeet
5.8786 × 10¹⁴ mimiles
6,324,100 AUastronomical units
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