The magnitude system used by astronomers ranks
\n\t\t\t\tstars by brightness, with the brightest stars having the
\n\t\t\t\tlowest values of magnitude.\u00a0 A star's magnitude is generally
\n\t\t\t\tmeasured after the starlight has passed through a colored
\n\t\t\t\tfilter, which gives a measure of a star's color.\u00a0Literally
\n\t\t\t\tdozens of filter systems are used by astronomers.\u00a0 The
\n\t\t\t\tmost common system for measuring color over the infrared,
\n\t\t\t\tvisible, and ultraviolet wavelengths is the Johnson-Cousins
\n\t\t\t\tUBVRI system.<\/p>\n","protected":false},"excerpt":{"rendered":"
The magnitude system used by astronomers ranks stars by brightness, with the brightest stars having the lowest values of magnitude.\u00a0 A star's magnitude is generally measured after the starlight has passed through a colored filter, which gives a measure of … Continue reading