Planck mass
The Planck mass is a small unit of mass used in physics. It is derived using an equation involving Planck's constant, the speed of light in a vacuum, and the gravitational constant. It is approximately 21.76 µg.
The Planck mass can be thought of as an upper bound for the mass of a single particle. A particle with more mass would become a black hole.[1] It's also a lower bound for the smallest possible black hole, since a black hole this small wouldn't be able to emit any Hawking Radiation to evaporate any smaller.
As with all Planck units, the idea was to have a definition based only on fundamental universal constants.
Planck Mass Media
A mass–radius log plot of various objects
Max Planck
References
- ↑ Faraoni, Valerio. Three new roads to the Planck scale. American Journal of Physics 85 (11) (November 2017). p. 865-869. doi:10.1119/1.4994804.