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Luminosity, size and distance. If all distances were equal, larger and hotter stars would be the brightest. But a so-so star 40 light years away, will frequently be brighter than a brilliant star 40,000 light years away, etc.

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14y ago

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Related Questions

Which factor does not affect the apparent brightness of a star?

How old a star is.


What terms takes into consideration the brightness of a star but ignores the differences that distance can make?

"Apparent magnitude" is the star's brightness after the effects of distance. "Absolute magnitude" is the star's brightness at a standard distance.


If the distance between us and a star is doubled the apparent brightness is decreased by a factor of four true or false?

True. The apparent brightness of a star is inversely proportional to the square of the distance between the star and the observer. So if the distance is doubled, the apparent brightness will decrease by a factor of four.


What two factor affect a stars apparent brightness?

Two factors that affect a star's apparent brightness are: 1.) The distance between the Earth and the star 2.) The absolute magnitude (the actual brightness) of the star Hope that helps :P


What factor affects the absolute brightness of a star?

Energy output, as absolute brightness (magnitude) is taken at a standard distance of 10 parsecs.


What does the absolute brightness of the star depend on?

the brightness of a star


What is the apparent brightness of a star as represented by a number on a logarithmic scale?

The apparent brightness of a star is represented by its apparent magnitude, which is a logarithmic scale used to measure the brightness of celestial objects as seen from Earth. The lower the apparent magnitude number, the brighter the star appears in the sky. Each increase of one magnitude corresponds to a brightness factor of 2.5.


What is the measure of the star's brightness?

The measure of a star's brightness is its magnitude. A star's brightness as it appears from Earth is called its Apparent Magnitude.Star's brightness is measured by there magnitude.


What factor does not affect the apparent brightness of a star?

The apparent brightness of a star is primarily affected by its intrinsic luminosity, distance from Earth, and any interstellar material that may dim its light. However, the color of the star does not directly affect its apparent brightness; it relates more to the star's temperature and stage of life rather than how bright it appears from our perspective. Thus, while color can indicate other properties of the star, it does not influence its apparent brightness.


What measures the brightness of the star?

photographs use to measure the brightness of a star


A star's brightness is the brightness seen by humans on Earth. A star's brightness is its actual brightness and does not depend on where the star is viewed from.?

The brightness as seen from Earth is called the "apparent magnitude".The real brightness (defined as the apparent brightness, as seen from a standard distance) is called the "absolute magnitude".


What is the purpose of a star's brightness?

There is no purpose of a star's brightness. They just exist and shine.