Planck relic
（ plural ）
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(physics, cosmology, astronomy, astrophysics, quantum mechanics, relativity theory) A spacetime singularity with an event horizon on the order of a Planck length (~ 10⁻³⁵ metres), and a mass on the order of a Planck mass (~ 20 micrograms), whose only possible decay route is emitting a single photon of Hawking radiation of that rest mass as energy, but thus disallowed by quantum physics transition prohibition, which becomes stable and everlasting if it does not absorb anything.
Planck relic
A Planck relic could, in principle, remain forever because its event horizon is on the order of a Planck length and its mass on the order of a Planck mass, while quantum transition prohibitions prevent it from decaying by emitting the single Hawking photon whose energy would equal its rest mass, leaving it stable unless it absorbs anything.
A Planck relic could, in principle, remain forever because its event horizon is on the order of a Planck length and its mass on the order of a Planck mass, while quantum transition prohibitions prevent it from decaying by emitting the single Hawking photon whose energy would equal its rest mass, leaving it stable unless it absorbs anything.
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