Where next?

Mass

Just how heavy is 1,000,000 solar masses?

Moons, planets & stars

1,000,000 M☉

Scale
1,000,000 solar masses

The quantity is exact as entered.

1.988 × 10³⁶ kgMass in kilograms
0 kg
Betelgeuse

Betelgeuse is a red supergiant star in the constellation Orion that changes in brightness over time.

2.983 × 10³¹ kgMass in kilograms
0 kgToo small to resolve at this scale; the locator is not the bar width.

Bar length measures mass, not physical size. Both bars start at zero kilograms (kg). Pictures identify the objects only.

A little perspective

1,000,000 solar masses is about 66,700 times the mass of Betelgeuse.

Measurements, assumptions & sources +

1,000,000 solar masses

Mass: 1,000,000 M☉; definition.

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

NIST — SI conversion factors

Betelgeuse

Mass: 15 M☉; 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 mass is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

Compare 1,000,000 solar masses with the mass of Betelgeuse. The notes below explain how each value was chosen.

1,000,000 solar masses

1,000,000 M☉

Mass · definition

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

Betelgeuse

15 M☉

Mass · rounded model

A deliberately rounded red-supergiant model. Its apparent edge varies with wavelength and the star changes over time.

Comparing
Mass ↔ Mass
Relative size
1,000,000 solar masses is about 66,700 times the mass of Betelgeuse.

How to read the visual

The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.

  • The mass of Betelgeuse: This is an illustrative comparison value, not a claim that every example is the same.

Mass is distinct from weight: an object’s mass stays the same as gravity changes.

1.9885 × 10³⁶ kgkilograms
4.3838 × 10³⁶ lbpounds
1.9885 × 10³³ ttonnes

Change your perspective

Put it next to…

Choose a suggestion to redraw the comparison, or open its page to learn what it is.

About this thing
About this thing
About this thing
About this thing
About this thing
About this thing

The full collection

Choose something to compare.

Loading compatible things…

A little smaller. A little larger.

Keep exploring mass.

See all ↗

Share a little perspective.