Which of the following is the most common type of main-sequence star?
A) an O star
B) an A star
C) an F star
D) an M star
E) a G star
Answer: D
Which of the following is the most common type of main-sequence star?
A) an O star
B) an A star
C) an F star
D) an M star
E) a G star
Answer: D