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Theres `Absolute Magnitude` which is the brightness of a star at a set distance. Then there is `Apparent Magnitude` which is the apparent brightness from earth, regardless of distance.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoIt's distance from Earth and the star's actual brightness
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∙ 15y agodistance from the observer and apparent brightness.
Wiki User
∙ 13y agothere is absolute brightness, then there is apparent brightness. if you are looking this up for homework or a quiz, its the right answer.
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∙ 14y agoWiki User
∙ 11y agoabsolute magnitude
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What affects the brightness of stars?
relative "brightness" is based on distance, size, and temperature
What are the two main properties that astonomers use to classify stars?
The surface temperature and the absolute magnitude, which is the brightness of the star when viewed from a standard distance of 10 parsecs.
What does measurement of the brightness of a star call?
Brightness of stars (apparent and absolute magnitude) is measured by convention, taking an another star as a standard.
What are the three main elements that determine a stars brightness from earth?
1) absolute brightness 2) distance 3) intervening dust
If two stars have the same apparent magnitude are they the same distance from Earth?
No. Brighter distant stars can have the same apparent magnitude as fainter stars that are closer.(Absolute magnitude does not refer to actual brightness, but rather to what the brightness of a star would likely be at an arbitrary distance of 10 parsecs, rather than its actual distance.)
A star's brightness as if it were a standard distance is called?
Absolute Brightness .
What affects the brightness of stars?
relative "brightness" is based on distance, size, and temperature
How can varble stars be used to determine the distance to globular clusters?
The idea is that CERTAIN TYPES of stars, including certain variable stars (such as Cepheids) have a known brightness; so if you observe their apparent brightness, you can calculate their distance.
Define standard candle as it is used in astronomy?
A "standard candle" in astronomy is an object whose luminosity (its true brightness, not just how bright it seems to us) can be estimated, based on characteristics of that type of object. Then its distance can be estimated from its "apparent magnitude". The stars called "Cepheid variables" are a good example. The rate at which their brightness varies is closely linked to their luminosity.
How can you clasiffy the stars?
by temperature, size, brightness, distance and color
What compares the brightness of stars as if they were the same distance from earth?
midorz
What is the stars actaul brightness?
That is called "absolute brightness" or "absolute magnitude". It is defined as how bright a star would look at a standard distance (10 parsec, to be precise). The brightness of stars can vary a lot; some stars (supergiants) are millions of times as bright as our Sun, others (red dwarves) are thousands of times less bright. (Our Sun is in the top 10 percentile, though.)
What are the two main properties that astonomers use to classify stars?
The surface temperature and the absolute magnitude, which is the brightness of the star when viewed from a standard distance of 10 parsecs.
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.
What is the standard unit for apparent brightness?
The apparent brightness of stars is called "apparent magnitude", and it is written with a lowercase "m" after the number.
What is the apparent brightness of the stars?
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.
What are the factors that affect the brightness of stars?
Distance and intervenng or close celestial bodies
