For a star $25$ times the mass of the Sun, how long does the Neon burning stage last?

Answer

About 1 year.

The evolutionary stages following hydrogen burning dramatically shorten in duration for high-mass stars; specifically, Neon burning lasts approximately one year for a star of $25 M_ ext{Sun}$.

For a star $25$ times the mass of the Sun, how long does the Neon burning stage last?
evolutionlife cyclestarmass