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Even though this star has an absolute magnitude greater then that of sirius it looks dimmer from earth since it's 100 times farther away?
The apparent brightness of a star depends mainly on (1) its absolute (i.e., real) brightness, and (2) the square of its distance from us.
The absolute magnitude of Sirius is +1.45, while that of Rigel is -6.95, meaning that Rigel is approximately 2,290 times as bright as Sirius. However, Rigel is approximately 100 times as far from us (870 light years versus 8.6 light years), which reduces its brightness relative to Sirius by a factor of over 10,000. This makes Sirius about 4.5 times brighter than Rigel for a difference of 1.62 magnitudes (-1.44 relative magnitude for Sirius versus +0.18 for Rigel).
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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
Explain a stars 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
What As a celestial object moves farther away from the viewer it will appear .?
It will look dimmer and dimmer. Also, smaller and smaller (the angular diameter gets to be smaller and smaller).
The father the star is away from the earth the more is is?
The farther the star is from Earth, the dimmer it appears to us. This is due to the inverse square law, which states that the intensity of light decreases in proportion to the square of the distance from the source. So, the greater the distance, the less light reaches Earth, making the star appear dimmer.
Why does some stars appear dimmer than others?
Stars appear dimmer than others due to factors such as distance from Earth, size, age, and intrinsic brightness. Stars that are farther away will appear dimmer, as less light reaches us. Similarly, smaller or older stars may be dimmer because they produce less light compared to younger, larger stars.
What star has a absolute magnitude greater than siriusit also looks dimmer from Earth its 100 times farther away.?
Deneb
What star has an absolute magnitude greater than that of Sirius's it looks dimmer from Earth since it's 100 times farther away?
Deneb
Even though this star has an absolute magnitude greater than that of sirius it looks dimmer from earth since its 100 times farther away?
The star's absolute magnitude is a measure of its intrinsic brightness. Sirius appears brighter from Earth than a star with a greater absolute magnitude because Sirius is closer to us, which affects its apparent brightness. The star with the greater absolute magnitude might be intrinsically brighter but is much farther away, leading to its fainter appearance from Earth.
What star looks dimmest from earth?
What star even tho this star has an absolute magnitude greater than that of Sirius it looks dimmer from earth since it's 100 times farther away
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.)
How will a star bright if it was near the sun?
A star near the Sun might be brighter or dimmer, it depends on how big it is. Each star has an absolute magnitude and if you find out a star's absolute magnitude, and then subtract 31.4, that would be its visual magnitude at the Sun's distance from us.
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.
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
How can the absolute magnitude of a star be calculated?
The basic idea is:* Measure the star's apparent magnitude * Calculate the star's distance * The absolute magnitude can be directly calculated from these two pieces of information. However, adjustments may need to be made for extinction - that is, if there is a lot of dust or gas between the star and us, it looks dimmer than without the dust or gas. Without extinction, the Wikipedia gives the following formula: M = m - 5((log10 DL) - 1) Where M is the absolute magnitude, m is the apparent magnitude, DL is the distance in parsec.
Explain a stars 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
