Match the word on the left with the definition on the
right.

black dwarf a. star left at the core of a planetary nebula

white dwarf b. a red supergiant star explodes

nebula c. a medium-mass star at the end of life

protostar d. a large cloud of gas or dust in space

supernova e. such a strong gravitational pull that no light escapes

neutron star f. the earliest stage of a star ’s life

black hole g. the remains of a high mass star