Understanding the Universe: An Introduction to Astronomy, 2nd Edition Season 1 Episode 44 The Intrinsic Brightnesses of Stars
- October 19, 2023
- 30 min
Apparent brightness is the observed brightness of a star. Because stars are at different distances, astronomers need a standard reference by which to compare stars in absolute terms, as if they're all at the same distance. This standard is called intrinsic brightness, or luminosity.