Which of these forms as part of the life cycles of both low-mass and high-mass stars as a result of a star-forming nebula
collapsing and spinning?
protostar
black hole
supernova
white dwarf
o

Suppose an astronomer discovers a large, spherical-shaped body orbiting the sun. the body is composed mostly of rock, and there are no other bodies sharing its orbit. what is the best way to categorize this body? a. planet b. moon c. comet d. asteroid