The probable progenitors of Type 1a supernovae, these objects remain at the centers of planetary nebulae after the outer layers of a star are dispersed.  Nearby examples include Procyon B and Sirius B, both about the size of 
The probable progenitors of Type 1a supernovae, these objects remain at the centers of planetary nebulae after the outer layers of a star are dispersed.  Nearby examples include Procyon B and Sirius B, both about the size of the Earth and mass of the Sun.  What class of stellar objects, for ten points, will our Sun likely join in 5 billion years.
The probable progenitors of Type 1a supernovae, these objects remain at the centers of planetary nebulae after the outer layers of a star are dispersed.  
white dwarfs