The star Capella has an apparent magnitude of 0 and is the same color as the Sun.Its distance is 14 parsecs.Which of the following describes its similarities with the Sun?
A)It must be identical to the Sun
B)It is less luminous than the Sun,but has the same temperature.
C)It is more luminous than the Sun,but has the same temperature
D)It is the same luminosity as the Sun,but has a different temperature

Question

Quizplus · Accepted Answer

Capella's same color as the Sun indicates a similar temperature, but its apparent brightness at a distance of 14 parsecs suggests it is more luminous than the Sun, as luminosity is a measure of the total energy emitted by a star.

The Star Capella Has an Apparent Magnitude of 0 and Is