What is the magnitude scale?

1 Answer

Magnitude scale is used in astronomy to classify stars brightness as seen fro earth..


In 124 Bc Hipparchus classified stars from 1 to 6 magnitude..He defined brightest stars as 1st magnitude and the most faint star we can see by naked eye as 6th magnitude.
In 1856 Norman Pogson gave it a scientific explanation
First magnitude stars are 100 times brighter tha n 6th magnitude star.. So each magnitude the difference is 5th Root of 100. THat is 2.512.enter image source here
Picture explains the magnitude of commom objects.
Picture credit ces lisc ernet.in