Absolute magnitude

/ˈæbsəˌlut ˈmæɡnɪˌtud/ noun

Definition

The apparent magnitude a star would have if placed at a standard distance of 10 parsecs (32.6 light-years) from Earth. This measure allows direct comparison of stellar intrinsic brightness regardless of distance.

Etymology

From Latin 'absolutus' (complete, unrestricted) and 'magnitudo' (greatness), coined in the early 20th century as astronomers developed methods to determine stellar distances and separate intrinsic brightness from distance effects.

Kelly Says

Our Sun is actually a pretty average star! With an absolute magnitude of +4.83, it would appear as a fairly faint naked-eye star if moved to the standard 10-parsec distance - much less impressive than its apparent magnitude of -26.7 from our nearby perspective.

Related Words

Explore More Words

Get the Word Orb API

Complete word intelligence in one call. Free tier — 50 lookups/day.