how we determine a star's true brightness

Stellar brightness is often quoted in terms of magnitude, whether apparent or absolute. This video explains the origins of these terms, the mathematics behind them and the limitations of using brightness as a means to discussing stellar properties.
Thanks to Prof Geraint Lewis (Cosmology at University of Sydney, Aus) for valuable feedback.
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[@bugpie9437]

"Stellar" video Paul. Thanks for your helpful insight

[@manasbhanwar7294]

Very nice explanation.. but can you make videos on the topics of the book "Astrophysics is Easy".. because your topics are somewhat similar to it? 🙂

[@ZL1379]

I love this , thank you !!!!!

[@PhysicsHigh]

You’re welcome

[@englishforfunandcompetitio248]

Wonderful. You're very articulate professor. I need to know how we are able to fix 0 right ascension? A complete technically detailed video is requested.

[@gobackstudy5773]

you are the best !

[@PhysicsHigh]

High praise 🤓. Thanks

[@astrospeedcuber]

This is so much better than my teachers. Also the fact that his accent sounds like he's from Australia, which I also am used to hearing (as I am also Australian), so that makes the explanation even easier to understand.

[@rbc812]

How to calculate brightness due to visible light only?

[@PhysicsHigh]

In essence it is the area under the black body curve for the range of visible wavelengths

[@rockapedra1130]

Beetle-goose