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Explain a stars apparent magnitude and absolute magnitude?
Allaboutthattakenlif...
Apparent magnitude is the brightness of an object as seen from Earth without any atmosphere.
Absolute magnitude is the brightness of an object as seen from a predetermined distance, depending on the object.
For planets, the distance used is 1 AU (Astronomical Units). Stars and galaxies use 10 parsecs which is about 32.616 light years.
The dimmer an object is the higher the positive value. The brighter an object is the higher the negative value.
Examples:
The Sun has an apparent magnitude of -26.74 but an absolute magnitude of 4.83
Sirius has an apparent magnitude of -1.46 but an absolute magnitude of -1.42
This means that from Earth, the Sun is a lot brighter, but if the Sun was replaced by Sirius, Sirius would be 25 times more luminous.
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Meda Jacobson
Wiki User
∙ 11y agoAverage!
It has an apparent magnitude of −26.73 and an absolute magnitude of about 4.83.
Wiki User
∙ 12y agoThe Sun has an absolute magnitude of 4.83.
See related question.
Wiki User
∙ 13y agoApparent magnitude is the brightness of a star as viewed from Earth, whereas absolute magnitude is the brightness of a star as viewed from ~32.6 light years away.
Wiki User
∙ 9y agoThe absolute magnitude is how bright a star would be if all stars were the same distance from Earth.
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What are two ways to describe a stars brightness?
Apparent magnitude and absolute magnitude.
What is a stars brightness as if it were a standard distance?
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.
What is the magnitude of Capella?
Capella (Alpha Aurigae) is the brightest star in the constellation Auriga.Although it appears as a single star, it is in fact a pair of binary stars. The primary pair are listed here.Capella A - Absolute magnitude: +0.35Capella B - Absolute magnitude: +0.20Capella A - Apparent magnitude: +0.91Capella B - Apparent magnitude: +0.76See related question for the difference.
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.)
How does the light from a flashlight that is shone from two differences model the apparent magnitude of two stars with the same absolute magnitude?
yall dont know that yall losers
What are two ways to describe a stars brightness?
Apparent magnitude and absolute 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 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.
How does apparent magnitude of a star differ from absolute magnitude?
Apparent magnitude is the brightness as observed from earth, while absolute magnitude is the brightness of a star at a set distance. The apparent magnitude considers the stars actual brightness as well as it's distance from us, but absolute magnitude takes the distance factor out so that star brightnesses can be directly compared.
Why is the absolute magnitude of some stars greater their apparent magnitude?
The apparent magnitude is how bright the star appears to us, but stars are all at different distances so that a star that is really bright might look dim because it is very far away. So the absolute magnitude measures how bright the star would look if it was placed at a standard distance of 10 parsecs. When the absolute magnitude is greater than the apparent magnitude, it just means that it is closer than 10 pc. The brightest stars have absolute magnitudes around -7.
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.
How 2 stars could have the same apparent magnitude but different absolute magnitudes?
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What is a stars brightness as if it were a standard distance?
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.
Explain why size is the only factor that determines the stars absolute magnitude?
The absolute magnitude is a measure of the star's luminosity hence the smaller the size the less the absolute magnitude.
Which one tells us how bright the stars would appear if all stars were at the same distance ferom the earth?
There are two terms used to describe a stars brightness, absolute magnitude and apparent magnitude. The one you want is absolute magnitude - this is where the stars distance from us is taken out of the equation, effectively comparing the stars brightness side by side from a set distance (10 parsecs or 32.6 light years). Apparent magnitude is the other measure, this is how bright a star apparently looks from Earth. The huge distances and range of distances involved means that you can have very bright stars (high absolute magnitude) that apparently look as bright as a much closer but dimmer (low absolute magnitude) star - their apparent magnitudes might be similar, but they may have vastly different absolute magnitudes.
What the relationship between magnitude and size of the star?
The brightness of a star depends on its temperature, size and distance from the earth. The measure of a star's brightness is called its magnitude. Bright stars are first magnitude stars. Second magnitude stars are dimmer. The larger the magnitude number, the dimmer is the star.The magnitude of stars may be apparent or absolute.
Is it possible for two regular stars to have the same absolute magnitude but differ in apparent magnitude?
One dimmer star can be closer than a brighter star that is far away. Light flux decreases as the square of the distance. A star that is three times as far away will have to shine nine times brighter than the closer star (absolute magnitude) to appear to have the same magnitude (apparent magnitude). Because apparent magnitude is the brightness of a star, as seen from Earth, whereas absolute magnitude is the brightness of a star as seen from the same distance - about 32.6 light years away.
