The planet with the least obvious ring system is ________.
Fill in the blank(s) with correct word
Question 2
Which of the following best describes the evolutionary track of the most massive stars?
A) vertically left, then straight down
B) horizontal right
C) horizontal right, then a clockwise loop
D) diagonally to lower right, then vertical, then horizontal left
E) horizontally right, diagonal to lower left, then horizontal right