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Why does Arcturus star have greater absolute magnitude than the sun buy a much lower apparent magnitude?
Wiki User
∙ 9y ago
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.
Wiki User
∙ 9y ago
Wiki User
∙ 10y agoThe absolute magnitude is the real brightness of a star; and it is defined as the apparent magnitude (apparent brightness) at a standard distance (10 parsec) - in other words, how bright would it look from that distance.
- For a star at the standard distance, the absolute and apparent magnitudes are the same.
- For a star at a distance greater than the standard distance, its apparent magnitude would be less than its absolute magnitude.
- For a star at less distance than the standard distance, its apparent magnitude would be greater than its absolute magnitude.
Wiki User
∙ 9y agoThe apparent magnitude (apparent brightness) depends both on the absolute magnitude (the actual brightness, as measured at a standard distance), and on the distance from us. All the stars other than the Sun are much more distant from us than the Sun; as a result, even a star a million times brighter than our Sun will look faint to us.
Wiki User
∙ 10y agoBecause it's so close to us.
The NEXT NEAREST star is more than 260 THOUSAND times
farther from us than the sun is.
Wiki User
∙ 8y agoTheir distance from us.
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What is an example absolute brightness?
Anything that is not the measure of intrinsic brightness of a celestial object.
Is sun the brightest star?
The brightness of a star is usually referred to as its magnitude. Every star has two magnitudes. The apparent magnitude is how bright it appears to us here on earth. The absolute magnitude is the apparent magnitude that the star would have, if it were viewed from a standard distance. The apparent magnitude of our sun is vastly greater than that of any other celestial object. In terms of absolute magnitude, our sun can't begin to compare with some of the big bright stars in the universe.
Why does a star such as Betelgeuse which is located far from earth have much greater absolute magnitude than apparent magnitude?
well my reason is that the betelgeuse must be very large , because they said that the betelgeuse is located far from earth .
Why does a star such as betelgeuse which is located far from earth have a much greater absolute magnitude than apparent magnitude?
well my reason is that the betelgeuse must be very large , because they said that the betelgeuse is located far from earth .
Which stars always have large positive absolute magnitude?
Does it mean that the star is a main sequesnce star? ( . Y . ) The above isn't true. A star can be a blue supergiant and be on the main sequence but still not be even visible to us, therefore the apparent and absolute magnitude wouldn't be the same. But to answer your question, I don't think it has a name, it just means that you are seeing the star's absolute and apparent magnitude at the same time, so if you placed the star at 32.6 light years away(the absolute magnitude scale)then the star would not appear to change in brightness
Why is Vega brighter than Betelgeuse?
A star's brightness is a function of its luminosity, or the amount of energy it produces per unit time. Vega must have a higher luminosity, meaning it fuses more material than Betelgeuse in a given period of time.
What is an example absolute brightness?
Anything that is not the measure of intrinsic brightness of a celestial object.
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.
Is sun the brightest star?
The brightness of a star is usually referred to as its magnitude. Every star has two magnitudes. The apparent magnitude is how bright it appears to us here on earth. The absolute magnitude is the apparent magnitude that the star would have, if it were viewed from a standard distance. The apparent magnitude of our sun is vastly greater than that of any other celestial object. In terms of absolute magnitude, our sun can't begin to compare with some of the big bright stars in the universe.
Why does a star such as betelgeuse which is located far from earth have a much greater absolute magnitude than apparent magnitude?
well my reason is that the betelgeuse must be very large , because they said that the betelgeuse is located far from earth .
Why does a star such as Betelgeuse which is located far from earth have much greater absolute magnitude than apparent magnitude?
well my reason is that the betelgeuse must be very large , because they said that the betelgeuse is located far from earth .
Which stars always have large positive absolute magnitude?
Does it mean that the star is a main sequesnce star? ( . Y . ) The above isn't true. A star can be a blue supergiant and be on the main sequence but still not be even visible to us, therefore the apparent and absolute magnitude wouldn't be the same. But to answer your question, I don't think it has a name, it just means that you are seeing the star's absolute and apparent magnitude at the same time, so if you placed the star at 32.6 light years away(the absolute magnitude scale)then the star would not appear to change in brightness
Which is greater -8 -6?
-2
What does magnitude refer to when doing mathematics?
Magnitude refers to the size of a mathematical object. The greater an object's volume, area, or length, the greater its magnitude. The magnitude of a number is referred to as its "absolute value."
Which is bigger negative 5 or negative 17?
The absolute value (magnitude) of -17 is greater than the absolute value (magnitude) of -5. -5 is considered to be greater (more positive) than -17.
Does Rigel have greater apparent magnitude than Sirius?
No, which means that Rigel appears brighter.
