Did you know you can measure the brightness of a star? Click on the link here to learn more about how a star is measured.
How To Measure The Brightness of Your Night Sky
Apparent magnitude - Wikipedia
Apparent Brightness, Definition and Overview
Measuring the Brightness of Stars
Luminosity and magnitude explained
SOLVED: Distances to local galaxies are determined by measuring
Luminosity and Distance
Measuring Stellar Temperatures
Brightness of stars
Apparent magnitude - Wikipedia
Photometry, Measuring Brightness & Intensity
Chapter 16--Properties of Stars