GENERAL KNOWLEDGE

Detailed explanation-1: -Astronomers define star brightness in terms of apparent magnitude-how bright the star appears from Earth-and absolute magnitude-how bright the star appears at a standard distance of 32.6 light-years, or 10 parsecs.

Detailed explanation-2: -Apparent magnitude (m) is a measure of the brightness of a star or other astronomical object observed from Earth. An object’s apparent magnitude depends on its intrinsic luminosity, its distance from Earth, and any extinction of the object’s light caused by interstellar dust along the line of sight to the observer.

Detailed explanation-3: -On the modern magnitude scale, Sirius, the star with the brightest apparent magnitude, has been assigned a magnitude of −1.5. Other objects in the sky can appear even brighter. Venus at its brightest is of magnitude −4.4, while the Sun has a magnitude of −26.8.