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Brightness Scale

Brightness of stars between 2 magnitudes The closer a star is the brighter it is… https://openstax.org/books/astronomy/pages/17-1-the-brightness-of-stars THE BRIGHTER A STAR IS THE SOONER IT WILL DIE

Brightness Formula

$m 1 - m 2 = 2.5 lo g (\frac{b _{2}}{b _{1}}) = 2.5 (lo g b_{1} - lo g b_{2})$ $\frac{b _{2}}{b _{1}} = 2. 5^{m_{1} - m_{2}}$

Absolute Brightness vs Apparent Brightness

Absolute Brightness is brightness measured from. 32.6 light years(10 parsecs) away. Apparent Brightness is monkey primal brightness. How our perception sees the brightness of the stars. No consideration to the distance.

m = apparent magnitude M = absolute magnitude

Apparent Brightness

the more negative the apparent brightness, the brighter it appears to us.

Star Facts

The sun is the brightest in Apparent brightness Sirius is the brightest in Absolute brightness

Example

question 12 from the textbook $m_{1} = s i r i u s = - 1.5$ $m_{2} = b e t e l g e u se = 0.12$ the more brighter star is ALWAYS the first value $m_{1}$

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The Brightness Scale

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