Question

question 8
when a star under about 8 - 10 solar masses ends its lifetime, its outer layers are blown off to form
a planetary nebula with a white dwarf in the center
a supernova remnant with a neutron star in the center
a nova with an accretion disk

Explanation:

Stars with a mass of about 8 - 10 solar masses or less, at the end of their life cycle, shed their outer layers to form a planetary nebula. The core that remains is a white - dwarf. Supernova remnants with neutron stars are formed from more massive stars. Novae are different types of stellar explosions not related to this end - of - life process for these lower - mass stars.

Answer:

a planetary nebula with a white dwarf in the center