Unformatted text preview: apparent magnitude will be higher. -So, nearby stars can trick us into thinking they are truly bright. -To compare stars fairly, we would need to place them all at the same distance…-We need a way to measure the intrinsic (true) brightness of stars.-The absolute magnitude does not depend on how far away it is.-It is a measure of the stars true energy output, not just its brightness as viewed from Earth. Absolute & Apparent Magnitude Apparent magnitude (m): the magnitude we see from Earth. Absolute magnitude (M): the intrinsic Magnitude (regardless of distance) Absolute mag. Is defined as the magnitude that a star would have if we viewed it at a distance of 10 pc. (parsecs) The sun’s Apparent magnitude is: m = -27 The Sun’s Absolute magnitude is: M = 4.8 If the sun were moved to a distance of 10 parsecs away, it would just barely be visible (apparent magnitude 4.8)...
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- Fall '09