Now consider the statements in Part A that are inferred from models. A solar model is used to calculate interior conditions based on certain "known" characteristics of the Sun, such the Sun’s total mass. How do we know the Sun’s mass?
A) We infer the mass from a model of the Sun.
B) We first measure the Sun's size and density, then use these measurements to calculate the Sun’s mass.
C) We can calculate it by using the law of conservation of energy with the measured amount of light that the Sun emits.
D) We can calculate it by applying Newton's version of Kepler's third law with Earth's orbital period (1 year) and Earth’s average distance from the Sun (1 AU).