The Crab Nebula is the result of a ____ that was witnessed on Earth in the year 1054.
Betelgeuse is a supergiant star that will eventually supernova, which means that by mass it is classified as a ____ .
The debris from the death of a high-mass star forms a ___ several light years across.
A _____ has a density higher than the density of a white dwarf.
____ actually occurred about 150,000 years ago in the Large Magellanic Cloud.
The ____ is the process by which hydrogen fusion proceeds in high-mass stars.
Carbon can be converted into oxygen in the cores of high-mass stars if carbon nuclei undergo a _____ .
helium capture reaction