1 solar mass
1 M☉Mass · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Mass
Just how heavy is 1 solar mass?
Moons, planets & stars
1 M☉
1 solar mass
The quantity is exact as entered.
1.988 × 10³⁰ kgMass in kilograms
0 kg
0 kg
Bar length measures mass, not physical size. Both bars start at zero kilograms (kg). Pictures identify the objects only.
A little perspective
1 solar mass is approximately equal to the mass of the Sun.
Measurements, assumptions & sources +
1 solar mass
Mass: 1 M☉; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Sun
Mass: 1 M☉; approximate.
Our star, modelled with the IAU nominal solar radius. “Surface” means the visible photosphere. The core is much hotter; this is not a solid surface.
The marked mass is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 1 solar mass with the mass of the Sun. The notes below explain how each value was chosen.
Sun
1 M☉Mass · approximate
Our star, modelled with the IAU nominal solar radius. “Surface” means the visible photosphere. The core is much hotter; this is not a solid surface.
- Comparing
- Mass ↔ Mass
- Relative size
- 1 solar mass is approximately equal to the mass of the Sun.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- The mass of the Sun: This is an estimate; check the notes for its rounding and uncertainty.
Mass is distinct from weight: an object’s mass stays the same as gravity changes.
1.9885 × 10³⁰ kgkilograms
4.3838 × 10³⁰ lbpounds
1.9885 × 10²⁷ ttonnes
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A little smaller. A little larger.