Apparent brightness and luminosity

Objects in the Universe

Properties of Light: Brightness, Luminosity and Flux

Astronomy - Measuring Distance, Size, and Luminosity (18 of 30) Absolute Magnitude

IB Physics: Brightness & Luminosity

The Life and Death of Stars: White Dwarfs, Supernovae, Neutron Stars, and Black Holes

Magnitudes: How astronomers measure brightness and use it to measure distances

Stellar Spectroscopy - what can we learn about stars

Classification of Stars: Spectral Analysis and the H-R Diagram

Distances: Crash Course Astronomy #25

Star Magnitude (Brightness) Explained

how we determine a star's true brightness

HR (Hertzsprung Russell) Diagram - how stars are classified based on magnitude & temperature