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Can 2 stars have the same absolute magnitude but different radius'?
Wiki User
∙ 10y ago
Yes. You can have a larger star that is cooler and thus emits less power per square meter, and a smaller star that is hotter, and emits more power per square meter. The total power emitted by the star is the surface area times the amount of power emitted per unit area.
Wiki User
∙ 10y ago
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What is the absolute magnitude of VY Canis Majoris?
The absolute magnitude of VY Canis Majoris is around -7.6. This massive red hypergiant star is one of the largest known stars in the universe, with a radius around 1420 times that of the Sun.
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.
How can two supergiant stars have an absolute magnitude of -3 but one has a radius of 10 times the sun and the other 100 times the sun?
The absolute magnitude of a star depends on the size and temperature; a large cooler star can generate as much light as a small very hot star.
Why is absolute magnitude stars used in the HR diagram?
The equation for the magnitude of a star is; M=m-5log(d/10) where:M - Absolute magnitude (The brightness of a star viewed 10 parsecs away)m - Apparent magnitude (The brightness of a star as viewed from Earth)d - Distance from the star (Pc)
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.
How 2 stars could have the same apparent magnitude but different absolute magnitudes?
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What are the different ways astronomers use to study stars?
the astronomers use Absolute magnitude
What is the absolute magnitude of the constellation scorpius?
Constellations don't have an absolute magnitude. That is a property of individual stars.
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 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.
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.
What is absolute magnitude of most yellow stars?
Most "yellow" stars fall into the classification of type G - the same as our Sun.They have an absolute magnitude of around 5.
What is the magnitude of a star if all stars were the same distance from earth?
Absolute magnitude
What are two ways to describe a stars brightness?
One way to describe a star's brightness is by its apparent magnitude, which is how bright it appears from Earth. Another way is by its absolute magnitude, which measures how bright a star would appear if it were placed at a standard distance of 10 parsecs from Earth.
What is thuban the stars luminosity?
Its absolute magnitude is -1.20.Its magnitude from our point of view is +3.65.
How can two supergiant stars have an absolute magnitude of -3 but one has a radius of 10 times the sun and the other 100 times the sun?
The absolute magnitude of a star depends on the size and temperature; a large cooler star can generate as much light as a small very hot star.
What is true about the absolute magnitude and temperature of supergiant stars?
Absolute magnitude: they are extremely bright. Temperature: their surface temperature is fairly low.
