Question

With whom the apparent magnitude is related to

Answer 1

The brighter an object appears, the lower its magnitude value (i.e. inverse relation), with the brightest astronomical objects having negative apparent magnitudes: for example Sirius at −1.46. The measurement of apparent magnitudes or brightnesses of celestial objects is known as photometry.

Answer 2

The magnitude system identifies the brightness of celestial bodies. The Greek astronomer Hipparchus had introduced this system in 150 BCE. The astronomers had found out a technology to objectively find out a star's brightness by the 19th century. In astronomy, apparent magnitude is the measure of a the apparent brightness of a celestial body from the Earth. The brighter the star, the lesser is its magnitude value. For example : The apparent magnitude of the Sun is -26.7.