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What is the stars intrinsic brightness called?
Luminosity.
How does the hertzsprung Russell diagram classify stars?
increase in absolute brightness as they increase in temperature.Increase in brightness as they increase in temperature
How are stars ranked according to temperature and brightness?
To do so, astronomers calculate the brightness of stars as they would appear if it were 32.6 light-years, or 10 parsecs from Earth. Another measure of brightness is luminosity, which is the power of a star - the amount of energy (light) that a star emits from its surface.
What compares the brightness of stars as if they were the same distance from earth?
midorz
What is similarities between apparent brightness and absolute brightness?
Both relate to brightness; both are measured in the same units; both are used for astronomical objects such as stars or galaxies.
Who classifies stars?
Astronomers classify stars.
Do stars have the same brightness and sizes?
No. Stars vary greatly in size and brightness.
Who classified stars according to their brightness?
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.
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.
Who created the Greek letter system of naming stars?
Johann Bayer developed the Bayer system of naming stars, which assigns stars a Greek letter as part of their identification. Usually this is related to the star's relative brightness or position in a constellation.
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
Who developed the first system to measure a stars brightness?
It was on a Quantitative scale by the Greek astronomer Hipparchus around 130 BC.
What is a stars apparent magnitude?
a stars brightness as seen from Earth
