Temperature

Just how hot is 1,000,000 kelvin?

Stars

1,000,000 K

999,730 °Cdegrees Celsius
1,799,500 °Fdegrees Fahrenheit
Log scale
LOG TEMPERATURE · log₁₀(1 + K)1,000,000 K1,000,000 K0 K · absolute zero
01
1,000,000 kelvin1,000,000 KTemperature · definition
02
Neutron star surface1,000,000 KRepresentative young surface temperature · representative · range 100,000 K–10,000,000 K
Celsius and Fahrenheit zero points are offsets. Compare temperature differences, not ratios in °C or °F. The kelvin axis starts at absolute zero.

A little perspective

1,000,000 kelvin and Neutron star surface are at the same temperature.

Measurements, assumptions & sources +

1,000,000 kelvin

Celsius and Fahrenheit have shifted zero points. Differences are useful; “twice as hot” in °C or °F is not a physical temperature ratio.

NIST — SI conversion factors

Neutron star surface

A representative one-million-kelvin thermal surface scale for a young neutron star. Surface temperature falls as the remnant cools and depends on age, magnetic field, atmosphere and observing model.

NASA Imagine the Universe — Neutron stars

The marked representative young surface temperature is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

The visual compares temperature with representative young surface temperature. The records below preserve each value’s basis and caveats.

1,000,000 kelvin

1,000,000 K

Temperature · definition

Celsius and Fahrenheit have shifted zero points. Differences are useful; “twice as hot” in °C or °F is not a physical temperature ratio.

Neutron star surface

1,000,000 K

Representative young surface temperature · representative · range 100,000 K–10,000,000 K

A representative one-million-kelvin thermal surface scale for a young neutron star. Surface temperature falls as the remnant cools and depends on age, magnetic field, atmosphere and observing model.

Comparing
Temperature ↔ Representative young surface temperature
Relative size
Temperature comparisons use an absolute difference in kelvins rather than a multiplicative ratio.

How to read the visual

The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.

  • Neutron star surface uses a 1,000,000 K central value within a recorded range of 100,000 K–10,000,000 K.
  • Neutron star surface is labelled representative; treat the displayed value as a comparison anchor rather than false precision.
  • The recorded ranges overlap, so the ordering can vary even though the central values differ.

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