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The Greeks had a system of classifying stars according tot heir brightness. The main Greek astronomer to use magnitudes was Ptolemy.
But the modern system of magnitudes was devised by Norman Pogson. A 1st magnitude star is defined as being 100 times brighter than a 6th magnitude star. A difference of one magnitude is equivalent to 2.512 times brighter or fainter.
Wiki User
∙ 8y ago
Wiki User
∙ 8y agoThe system was originally devised by Hipparcus, and defined more precisely in modern times.
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What are the two ways stars are classified?
Two ways are by temperature and brightness
Do stars have the same brightness and sizes?
No. Stars vary greatly in size and brightness.
What is a stars brightness known as?
A star's brightness is known as its magnitude. Stars with lower magnitude numbers are brighter than stars with a higher magnitude number.
What affects the brightness of stars?
relative "brightness" is based on distance, size, and temperature
Temperature and brightness of stars are indicated by what?
by me and you
What are the ways stars are classified?
Two ways are by temperature and brightness
What are the two ways stars are classified?
Two ways are by temperature and brightness
How are stars classifieds?
Stars are classified by their color, temperatures, sizes, and brightness, it could also be by composition and radiation.Scientists classify stars by color, luminosity, and temperature.
Do stars have the same brightness and sizes?
No. Stars vary greatly in size and brightness.
What are the two ways stars are classified according to this chart?
spectrum and temperature
What is a stars brightness known as?
A star's brightness is known as its magnitude. Stars with lower magnitude numbers are brighter than stars with a higher magnitude number.
What affects the brightness of stars?
relative "brightness" is based on distance, size, and temperature
Is shape affects the brightness of the stars?
no
What is the measure of a stars brightness?
Magnitude.
Temperature and brightness of stars are indicated by what?
by me and you
In main-sequence stars how does brightness relate to temperature?
The brightness is very similar to the temperature, the brightness relies on the temperature
What are the four characteristics that scientists use to classify stars?
Stars are classified by four different characteristics. Apparent magnitude (brightness) and absolute magnitude (how bright it would appear at 10 parsecs from the earth). Luminosity, another measure of brightness, compares the star to the sun's brightness. Spectral classifications are measured by the star's temperatures. Finally stars are signed a number by scientists through the Morgan-Keenan System.
