The Branch of Astronomy That Studies the Structure and Evolution

Q140: An extremely large collection of stars bound

Q141: The "surface" of a black hole is

Q142: Stars in the process of forming are

Q143: One parsec is equivalent in distance to

Q144: The estimated number of stars in the

Q146: In a star, the condition of balance

Q147: A Type II supernova can form a(n)

Q148: The half-circle that defines the starting point

Q149: The visible surface of the Sun has

Q150: The radial distance to the event horizon