Nemesis Explodes

See "Pride," here.

Poul Anderson describes a brown dwarf transitioning from planet to star:

the red disc of Nemesis shudders;
its cloud bands are ripped apart;
its votices shatter;
waves run from the poles;
they meet and recoil at the equator;
surface features vanish;
Nemesis swells visibly, obscuring the stellar background.

Now the moons of a planet have become the planets of a star. How does this affect the life on the innermost satellite and the human beings observing from their spaceship? How many such dramatic stellar and cosmic events does Poul Anderson describe in various works of hard sf? (See Unusual Heavenly Bodies.)

"'...this crew ought to have included a poet. But they have no imagination in Stockholm.'" (p. 2)

However, Poul Anderson does. A poet goes to Proserpina in Harvest The Fire. See:

Poets Of Space
Bard Of A Heroic Age: Physics And Poetry