An astronomical unit (au) is a unit of
A) time equal to the time taken for light to travel from the Sun to Earth.
B) length, defined as the wavelength of light from krypton gas.
C) length, the average distance between the Sun and Earth.
D) mass equal to 1 solar mass.

Question

Quizplus · Accepted Answer

An astronomical unit (au) is defined as the average distance between the Earth and the Sun, approximately 149.6 million kilometers. This unit is used to measure distances within our solar system.

An Astronomical Unit (Au) Is a Unit of