Andromeda galaxy stellar luminosity
Andromeda galaxy stellar luminosity is the total power emitted as starlight by all the stars in the Andromeda galaxy.
Also known as: M31 stellar luminosity, Andromeda luminosity
How big is it?
1 × 10²⁵ TW of power
Representative stellar luminosity · representative
Typical recorded range: 5 × 10²⁴ TW to 2 × 10²⁵ TW.
A little perspective
About 217,000 times the power of Crab pulsar spin-down power.
Crab pulsar spin-down power: Crab pulsar spin-down power is the rate at which the Crab pulsar loses rotational energy, emitting it as radiation and particles.
Measurements, assumptions & sources +
Andromeda galaxy stellar luminosity
A representative 10^37 W total stellar-luminosity scale for the Andromeda galaxy. Estimates depend on wavelength, dust correction, stellar-population model and the adopted outer boundary; this is emitted starlight, not flux received at Earth.
NASA — Andromeda galaxy overview
The marked representative stellar luminosity is calibrated. Unmeasured illustration details are representative.
Crab pulsar spin-down power
A curated crab pulsar spin-down power comparison anchor. The representative value and any stated range preserve the backlog measurement convention; operating or experimental conditions can change real observations.
Defined examples — our methodology
The marked power is calibrated. Unmeasured illustration details are representative.
Change your perspective
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Why this measurement?
Why we use 1 × 10²⁵ TW
For comparison, this page uses representative stellar luminosity. This is labelled representative; the central value is useful for comparison, while real values or measurement solutions can vary. The recorded range is 5 × 10²⁴ TW to 2 × 10²⁵ TW.
A representative 10^37 W total stellar-luminosity scale for the Andromeda galaxy. Estimates depend on wavelength, dust correction, stellar-population model and the adopted outer boundary; this is emitted starlight, not flux received at Earth.
The identifying illustration and the numerical comparison remain separate. How calibrated comparisons work →
Recorded properties
Andromeda galaxy stellar luminosity dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 1 × 10²⁵ TW | 5 × 10²⁴ TW to 2 × 10²⁵ TW | representative |
Around this scale
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These links use compatible power records, ordered around the selected value.
Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- NASA — Andromeda galaxy overviewM31 stellar-population and galaxy context; total stellar luminosity depends on wavelength, dust correction and boundary model.
There’s always another scale
Follow your curiosity.
SpaceAndromeda galaxy79.72 kpcThe Andromeda galaxy, also called M31, is the nearest large spiral galaxy to the Milky Way.
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