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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.
What else can I help you with?
How does the hertzsprung Russell diagram classify stars?
increase in absolute brightness as they increase in temperature.Increase in brightness as they increase in temperature
What compares the brightness of stars as if they were the same distance from earth?
midorz
What is similarities between apparent brightness and absolute brightness?
Both relate to brightness; both are measured in the same units; both are used for astronomical objects such as stars or galaxies.
Are stars different sizes and brightness?
Yes! Some stars are supergiants, which means that they are high-mass stars. They explode in a supernova towards the end of their life. These stars are generally brighter than others. A star's brightness also depends on its temperature. Red stars are the coolest temperature, followed by orange, yellow, white and blue stars.
Where does the actual brightness of the stars depends?
The actual brightness of stars, known as their intrinsic luminosity, depends primarily on their temperature, size, and energy output. Hotter and larger stars emit more energy and therefore appear brighter. Additionally, the composition of a star, including its age and the presence of elements, can also influence its luminosity. Ultimately, a star's brightness is a combination of these factors, along with its distance from Earth, which affects how we perceive its brightness from our vantage point.
What do astronomer plan to find out by classifying stars?
they plan to find the size, temperature, brightness,
What is the ratio of brightness a twelfth magnitude and fifteenth magnitude star?
the ratio of brightness is 16:1
Do stars have the same brightness and sizes?
No. Stars vary greatly in size and brightness.
Two stars whose apparent magnitudes differ from each other by five magnitudes have a ratio of brightness of?
About 97.7 (calculated as 2.55)
Which two groups of stars can have similar brightness?
Variable stars and main sequence stars can have similar brightness. Variable stars, like Cepheid variables, can fluctuate in brightness over time, while main sequence stars maintain a relatively stable brightness due to their fusion processes.
What is a stars brightness known as?
A star's brightness is known as its magnitude. Stars with lower magnitude numbers are brighter than stars with a higher magnitude number.
Temperature and brightness of stars are indicated by what?
Temperature of stars is indicated by their color, with blue stars being hotter than red stars. Brightness of stars is indicated by their luminosity, which is how much light a star emits.
What is the measure of a stars brightness?
Magnitude.
Is shape affects the brightness of the stars?
no
In main-sequence stars how does brightness relate to temperature?
The brightness is very similar to the temperature, the brightness relies on the temperature
What determines how bright stars are?
Size and temperature determine the brightness of stars.
Stars that can change their brightness?
the moon can vary its brightness and the pink elephant called aphadophalis
