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If two stars have the same absolute magnitude but one of the stars is farther from earth than the other one which star would appear brighter in the night sky?
If two stars have the same absolute magnitude, the one that is closer to Earth will appear brighter in the night sky. This is because brightness as perceived from Earth depends on both the intrinsic luminosity of the star (absolute magnitude) and its distance from us. The farther star, despite having the same intrinsic brightness, will have a dimmer apparent magnitude due to the greater distance light must travel to reach us.
What is the absolute magnitude for a black hole?
"Absolute magnitude" talks about the intensity of light radiating from a source. The black hole is black because no light radiates from it. So you'd have to say that its magnitude ... visual, absolute, intrinsic, or any other kind of magnitude ... is infinite. (Magnitude numbers are higher for dimmer sources.)
What does rigel have brighter then Sirius?
I'm not sure exactly what detail you want, but here's a start. Rigel is a triple star system. The main star of the three is a very luminous star. It is a blue supergiant star.
A sentence for absolute magnitude?
Two stars may look, for us, like they have about the same brightness, but it may be that one is a hundred times farther away... and 10,000 times brighter. The two things cancel out in this example. The "absolute brightness" tells us how bright a star or other object REALLY is. It is defined as how bright the object looks at a standard distance.
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.
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
What is the relationship between luminosity and absolute magnitude in stars?
The relationship between luminosity and absolute magnitude in stars is that luminosity measures the total amount of energy a star emits, while absolute magnitude measures the brightness of a star as seen from a standard distance. Stars with higher luminosity have lower absolute magnitudes, meaning they appear brighter in the sky.
Why does Arcturus star have greater absolute magnitude than the sun buy a much lower 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.
Are absolute magnitude and apprent magnitude the same thing?
No, absolute magnitude and apparent magnitude are not the same thing. Apparent magnitude is a measure of how bright an object appears from Earth, taking into account its distance and intrinsic brightness. Absolute magnitude, on the other hand, is a measure of how bright an object would appear if it were located at a standard distance of 10 parsecs (32.6 light-years) away from Earth.
Is the brightness of a star compared to other stars called its magnitude.?
No; the "magnitude" is how bright the star is. It can either mean:* The apparent magnitude = how bright it seems to us, * The absolute magnitude = how bright the star really is (i.e., how bright it would seem at a standard distance).
What is an absolute number on a number line?
Numbers can have an absolute magnitude, which means the size of the number whether positive or negative (in other words, 5 or -5 both have an absolute magnitude of 5) but there is no established meaning for "absolute number". Numbers can be a variety of things; they can be real or imaginary, they can be rational or irrational, they can be transcendental, they can be finite or transfinite. But they are not described as absolute (again, except in the contest of absolute magnitude).
What are the relationships between apparent magnitude and absolute magnitude?
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 4.83Sirius has an apparent magnitude of -1.46 but an absolute magnitude of -1.42This 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.See related links for more information
