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Generally speaking, the apparent luminosity would be an inverse square relationship, which is to say, if the same star was at twice the distance, a quarter of the light would be reaching the observer. But absolute luminosity can of course vary without regard to distance from Earth - dim stars can be close, or bright stars distant, or vice-versa.
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How do you measure the distance to a cepheid?
Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.
How is the brightness of a Cepheid star calculated by knowing the period?
The brightness of a Cepheid star is determined by its period-luminosity relationship, which is a relationship between the star's variability period and its intrinsic luminosity. By measuring the period of a Cepheid star, astronomers can use the period-luminosity relationship to calculate its luminosity, and from there determine its apparent brightness as observed from Earth.
The scale shows the relationship between distance on a map and on the Earth's surface. True False?
True
What is the relationship between earth day length and the distance from the sun?
There is no direct relationship between the rotation of a planet (which governs day length) and a planets distance from the sun. The nature of the planets spin is more to do with the formation of the system early on, by large impacts of the more numerous bodies that would have been around.
List three factors that control the apparent brightness of a star as seen from earth?
The apparent brightness of a star is determined by its luminosity (true brightness), distance from Earth, and any intervening dust or gas that may absorb or scatter its light. These factors affect how bright a star appears in the night sky to an observer on Earth.
How do you measure the distance to a cepheid?
Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.
What is the relationship between the distance on a map and the actual distance on the earth tal what is the relationship between the distance on a map and the actual distance on the earth callied?
scale
How is the brightness of a Cepheid star calculated by knowing the period?
The brightness of a Cepheid star is determined by its period-luminosity relationship, which is a relationship between the star's variability period and its intrinsic luminosity. By measuring the period of a Cepheid star, astronomers can use the period-luminosity relationship to calculate its luminosity, and from there determine its apparent brightness as observed from Earth.
What is the relationship between luminosity and magnitude in stars?
The relationship between luminosity and magnitude in stars is that luminosity measures the total amount of light a star emits, while magnitude measures how bright a star appears from Earth. A star's luminosity is its actual brightness, while its magnitude is its apparent brightness as seen from Earth. The lower the magnitude, the brighter the star appears, and the higher the luminosity, the more light the star emits.
What is the relationship between the magnitude and luminosity of a star?
The magnitude of a star is a measure of its brightness as seen from Earth, while luminosity is the total amount of energy a star emits. The relationship between magnitude and luminosity of a star is that a star's luminosity is directly related to its magnitude - the brighter a star appears (lower magnitude), the higher its luminosity.
Why would two stars have different sizes and tempertes but same luminosity?
The luminosity depends on what stage of its life cycle the star is in. Also, the apparent luminosity depends on the distance from earth.
What tells the relationship between the distance on the map and the distances on Earth's surface?
scale
How can you find the luminosity of a main sequence star?
You can find the luminosity of a main sequence star by measuring its apparent brightness and distance from Earth. Knowing the distance allows you to calculate the star's absolute brightness. Luminosity is then determined by comparing the absolute brightness of the star to that of the Sun, which has a known luminosity.
How do you determine a stars luminosity?
To determine a star's luminosity, one can measure its apparent brightness as seen from Earth and correct for distance. Using this information along with the star's surface temperature, one can apply the Stefan-Boltzmann law to calculate the star's luminosity. This process allows astronomers to compare the intrinsic brightness of stars regardless of their distance from Earth.
What does scale mean in geography?
It means The relationship between distance on a map and on the earth's surface.
Why must a star's parallax be known before you can find the luminosity?
Knowing a star's parallax allows us to determine its distance from Earth. Once we know the distance, we can calculate the star's luminosity by measuring its apparent brightness. This is because luminosity decreases with the square of the distance from the observer, so knowing the exact distance is crucial for accurate luminosity calculations.
What is the relationship between the magnitude and luminosity of a celestial object?
The relationship between the magnitude and luminosity of a celestial object is that the magnitude is a measure of how bright the object appears from Earth, while the luminosity is a measure of the total amount of light energy the object emits. In general, a higher luminosity corresponds to a higher magnitude, but the distance of the object from Earth also plays a role in determining its apparent brightness.
