Physics
How long does light take to escape the Sun?
Energy released in the Sun's core takes tens of thousands of years to random-walk to the surface, then 8 minutes to reach Earth.
Source: Mitalas & Sills (1992), Astrophysical Journal.
Context
Tens of thousands of years. Energy produced in the core is absorbed and re-emitted so many times on its way out that it performs a random walk through the dense interior.
Mitalas and Sills worked through the figure in 1992. Once the energy reaches the surface, the last stretch to Earth takes 8 minutes.
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