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How Hot is a Black Hole?

Published in Black Hole Temperature 2 mins read

The temperature of a black hole is extremely low, approaching absolute zero.

Black Hole Temperature Explained

Black holes, despite their reputation as cosmic devourers, are not fiery furnaces. Instead, they are incredibly cold objects, and their temperature is inversely proportional to their mass. This means:

  • More massive black holes are colder.

Temperature Scale

The temperature of a black holes is measured in Kelvin (K). Absolute zero is 0 K, which translates to −273.15 degrees Celsius.

Stellar Black Holes

  • Stellar black holes, which are formed from the collapse of massive stars, are extremely cold. They have temperatures that are nearly absolute zero.
  • Reference: "Stellar black holes are very cold: they have a temperature of nearly absolute zero – which is zero Kelvin, or −273.15 degrees Celsius." - 19-Oct-2022

Temperature vs. Mass

The more mass a black hole has, the lower its temperature will be. This is a somewhat counter-intuitive concept.

Table of Temperatures

Black Hole Type Approximate Temperature
Stellar Black Hole Near Absolute Zero
Supermassive Black Hole Even Colder

Key Takeaways

  • Black hole temperatures are incredibly low, especially for stellar mass black holes.
  • The temperature decreases as the black hole's mass increases.
  • Stellar black holes have temperatures close to absolute zero.

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