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There are three factors, actually.
The star's size and temperature determine the absolute magnitude, or how bright the star really is.
Those two factors can be considered as one - the star's absolute magnitude.
The absolute magnitude combined with our distance from the star determines its apparent magnitude, or how bright the star appears to be from Earth.
So, a big, hot, super bright star very far away may have the same apparent magnitude as a small, cool star that's fairly close to the Earth.
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What is a stars apparent magnitude?
a stars brightness as seen from Earth
What are two ways to describe a stars brightness?
Apparent magnitude and absolute magnitude.
The brightest stars have apparent magnitudes that are?
Negative The apparent magnitude of our sun is -26.73 whereas Vega is +0.03
Is Vega or Betelgeuse the brightest star?
Brightness is a function of a stars luminosity as observed from Earth. So our Sun is the brightest. Vega has an apparent magnitude of: 0.03 Betelgeuse has an apparent magnitude of 0.42 So, in apparent magnitude, Vega is brighter.
What is a stars level of brightness as viewed by the unaided eye called?
Apparent magnitude.
Why is the absolute magnitude of some stars greatar than their apparent magnitude?
The question is: Why is the apparent magnitude of some stars less than their absolute magnitude. Or: Why do some stars not look as bright as they really are ? The answer is: Because they're so far away from us.
What is a stars apparent magnitude?
a stars brightness as seen from Earth
What are two ways to describe a stars brightness?
Apparent magnitude and absolute magnitude.
What factors determind a stars apparent magnitude?
The star's real magnitude (brightness), its distance from us, and anything in between (usually dust or gas) which might absorb part of the light.
What is the 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 actual amount of light a star gives off?
It is actually absolute magnitude, opposed to apparent magnitude which is how much light stars appear to give off.
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 stars are visible from earth?
a star with apparent magnitude of 6 or less, the lesser the magnitude the brighter the star
The brightest stars have apparent magnitudes that are?
Negative The apparent magnitude of our sun is -26.73 whereas Vega is +0.03
Is Vega or Betelgeuse the brightest star?
Brightness is a function of a stars luminosity as observed from Earth. So our Sun is the brightest. Vega has an apparent magnitude of: 0.03 Betelgeuse has an apparent magnitude of 0.42 So, in apparent magnitude, Vega is brighter.
What is the stars in a Leo?
Here is some information on three of Leo's stars - The three brightest stars in Leo the Lion are : Alpha Leonis or Regulus (the Lion's heart) with an apparent magnitude of 1.35, Beta Leonis or Denebola (the Lion's tail) with an apparent magnitude of 2.14 and Gamma Leonis or Algieba (where the Lion's mane meets his body) with an apparent magnitude of 1.98
Why is absolute magnitude of some stars greater than their apparent magnitude for stars?
The apparent magnitude is what we see, and this can be measured directly. The absolute magnitude must be calculated, mainly on the basis of (1) the apparent magnitude, and (2) the star's distance. So, to calculate the absolute magnitude, you must first know the star's distance.
