An astronomical unit (AU) is
A) any very large unit, such as a light-year.
B) the average distance between Earth and the Sun.
C) the current distance between Earth and the Sun.
D) the average distance between any planet and the Sun.
Answer: B
An astronomical unit (AU) is
A) any very large unit, such as a light-year.
B) the average distance between Earth and the Sun.
C) the current distance between Earth and the Sun.
D) the average distance between any planet and the Sun.