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Is the brightness of a star compared to other stars called its magnitude.?
Wiki User
∙ 7y ago
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).
Wiki User
∙ 7y ago
Anonymous
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What planet exhibit the greatest variation in apparent brightness from earth?
Mercury's brightness, as seen from Earth, can vary as much as 6 magnitudes, depending on where it is in its orbit. This variation in apparent visual magnitude is the greatest compared to the other planets within our solar system.
Define magnitude and intensity?
Magnitude is the measure of the brightness of a star or other celestial body.And, intensity is the measure of energy flux
What is the brightness of the star called?
Absolute magnitude and apparent magnitude. Absolute magnitude is how bright the star actually is. Apparent magnitude is how bright the star appears from a given vantage point. It depends on the star's absolute magnitude and how far away it is.
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 is the Hertzsprung-Russell diagram called a color magnitude diagram?
One axis has the color, the other the magnitude.
What term is used to describe a star's brightness?
It is called Vmag. This is the visual magnitude of the object. Visual magnitude is a scale used by astronomers to measure the brightness of a star or other celestial object. Visual magnitude measures only the visible light from the object. The lower the V-MAG the brighter the star. You can go to http://seasky.org/pictures/sky7b14.html to learn more.
What planet exhibit the greatest variation in apparent brightness from earth?
Mercury's brightness, as seen from Earth, can vary as much as 6 magnitudes, depending on where it is in its orbit. This variation in apparent visual magnitude is the greatest compared to the other planets within our solar system.
How are stars brightness compared to each other?
Astronomers use the term magnitude to compare the brightnesses of stars. Really bright stars are 1st magnitude while the faintest we can see with the naked eye are about magnitude 6. A 12 inch telescope can see down to about magnitude 14 or 15. Hubble Space Telescope can see down to about magnitude 27.
Define magnitude and intensity?
Magnitude is the measure of the brightness of a star or other celestial body.And, intensity is the measure of energy flux
How can tell how bright a star really is?
Astronomers define star brightness in terms of apparent magnitude (how bright the star appears from Earth) and absolute magnitude (how bright the star appears at a standard distance of 32.6 light years, or 10 parsecs).
Why does a star look smaller than another star but is bigger than the other star?
Normally you would observe the star's brightness, not its apparent diameter.The star's apparent brightness ("apparent magnitude") depends on its real brightness ("absolute magnitude"), and on the distance. Similarly, the star's apparent angular diameter (which is VERY hard to measure) would depend on its actual diameter, and on the distance.
What is the brightness of the star called?
Absolute magnitude and apparent magnitude. Absolute magnitude is how bright the star actually is. Apparent magnitude is how bright the star appears from a given vantage point. It depends on the star's absolute magnitude and how far away it is.
How do you find the brightness ratio of stars?
The brightness ratio of stars is typically expressed using a magnitude scale. The magnitude scale is a logarithmic scale that measures the brightness of celestial objects, including stars. The lower the magnitude value, the brighter the object. Conversely, higher magnitude values indicate fainter objects. The magnitude scale is defined such that a difference of 5 magnitudes corresponds to a brightness ratio of exactly 100. In other words, a star that is 5 magnitudes brighter than another star is 100 times brighter. Similarly, a star that is 10 magnitudes brighter is 100 x 100 = 10,000 times brighter, and so on. To find the brightness ratio (R) between two stars with different magnitude values (m1 and m2), you can use the following formula: R = 100^( (m2 - m1) / 5 ) Where: R = Brightness ratio between the two stars. m1 = Magnitude of the first star. m2 = Magnitude of the second star. For example, if Star A has a magnitude of 2 and Star B has a magnitude of 6, you can calculate the brightness ratio as follows: R = 100^( (6 - 2) / 5 ) R = 100^(4/5) R ≈ 2.511 So, Star B is approximately 2.511 times dimmer than Star A. It's important to note that the magnitude scale is relative, and negative magnitudes indicate exceptionally bright objects (e.g., the Sun, which has an apparent magnitude of approximately -26.74), while positive magnitudes represent progressively fainter objects. Additionally, the magnitude of a star can be influenced by various factors, such as distance, intrinsic brightness, and interstellar dust extinction.
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.
How would you compare the brightness of Polaris with that of other stars in the sky?
Stars' brightness is measured by their magnitudes. There are first-magnitude stars which are the bright ones, down to 6th magnitude which is the faintest that can be seen with perfect eyesight on perfectly clear nights. Within that you can have stars with fractional magnitudes, for example magnitude 3.5 is half a magnitude fainter than magnitude 3. There are also negative magnitudes for the few brightest stars that are brighter than magnitude 0. The scale is logarithmic, with a difference of 5 magnitudes equal to a difference of 100 in brightness. Each magnitude is a ratio of 100^(1/5) which is equal to 2.512. Polaris has a magnitude of 2.02 and is less than a degree from being exactly in line with the Earth's north and south poles, which means when you look at it you are always facing north, to better than 1 degree.
Why is the Hertzsprung-Russell diagram called a color magnitude diagram?
One axis has the color, the other the magnitude.
What is the difference between negative and positive degrees of brightness in stars?
Negative numbers are brighter. Our Sun has an apparent magnitude of -26.73, the Moon around -12. Sirius on the other hand has an apparent magnitude of -1.46, whereas apparent magnitude of Pluto's smallest moons Hydra and Nix is 23.
