Absolute Magnitude

The absolute magnitude of a star is the brightness that a star would appear if it was at a distance of 10 parsecs from the Earth. It is a very convenient way of comparing brightness of different stars as it is a standardised measure.

The Sun, as our nearest star, is also the visually brightest, however, when compared to other stars by using the absolute magnitude scale, it is fairly faint – it has an absolute magnitude of 4.8, faintly visible to the naked eye buch a lot dimmer than we see the stars of the Plugh constellation.

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