Assuming stars are spherical then surface area is given by. Stars vary enormously in luminosity ranging from less than 10-4 that of our Sun to 10 6 more luminous.
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Which of the following best describes a star.
. Fusion often begins before a star is in equilibrium on the main sequence. The spectral type tells us the stars temperature while the luminosity. Surface area 4Ï€ R2 45 where R is the radius of the star.
The total energy output per second of a star is called its luminosity L sometimes written as L. Two stars can have the same luminosity but different apparent magnitudes depending on how far away they are. Hence that of Sirius can be written as 25 L Sun.
To calculate the total luminosity of a star we can combine equations 44 and 45 to give. Which of the stars shown on the HR diagram has the largest luminosity. Apparent magnitude does not.
In a later chapter we will see that if we can measure how much energy a star. Luminosity classes of stars are designated by Roman numerals and tell us what region of the H-R diagram the star falls in. A unit of DNA that determines a specific trait in the organism _____ e.
The luminosity of a star will remain constant over the life of a star but its apparent magnitude will change daily. So based on this the star change the fixture of the name of the planet also at the same time it measures the type of star that contains less luminosity star which we called as the white dwarf. A star is a celestial body ---Hertzsprung-Russell Diagram DRAFT.
For example the luminosity of Sirius is about 25 times that of the Sun. The measurement of the luminosity of a star depends on the position of the observer. Describes a species that no lon.
The absolute luminosity is about 38391026 W or 38391033 ergsecond. Are all stars with dim luminosity. Which statement describes the general relationship between the temperature and the luminosity of main sequence stars.
See answer 1 Best Answer. Basically for example if. Which of the following describes the suns place in its life cycle.
8th - 10th grade. The Suns position in space is best described as the approximate center of 1 a constellation 3 the universe 2 the Milky Way galaxy 4 our solar system 13. Base your answer to this question on the Characteristics of Stars diagram in the Earth Science Reference Tables.
Two stars have the exact same luminosity but star Y is four times dimmer looking that star X. To make the comparison among stars easy astronomers express the luminosity of other stars in terms of the Suns luminosity. The following information should be considered.
Choose the correct statement explaining what do we mean by a stars luminosity class and how we classify stars by spectral type and luminosity class. This means that star Y is ____ as far away as star X. 43 The luminosity of this star can best be described as 1 less than the luminosity of the Sun 2 greater than the luminosity of most stars in the main sequence 3 approximately the same luminosity as a white dwarf 4 approximately the same luminosity as Aldebaran.
Best suited to survive in. Report an issue. It is a nebula.
This becomes apparent when we plot stars on an HR diagram. The comparative luminosity of an astronomical object is based on the Sun so it has a. Since the star having a low luminosity and a temperature of around 20000 K.
Luminosity is measured in units of watts. Based on this graph which statement best describes how the luminosity of a main-sequence star compares to its mass. It is how bright a star is but it depends on which star your talking about.
The evolution of a solar mass star on the H-R diagram can best be described as. When I say apparent brightness I mean how bright the star appears to a detector here on Earth. A stars luminosity is measured according to the relevance to the sun.
Luminosity is always given as a numerical value. A trait that a species develops over generations which helps it to survive _____ d. Fusion begins when a star reaches the main sequence.
Its color is most likely to be. Decreasing luminosity at constant temperature then increasing temperature at constant luminosity. A star with ten times the mass of the Sun will have a luminosity that is ten times the luminosity of the Sun.
4The star Canopus has a surface temperature of 7400 K and a luminosity relative to the Sun of 1413. Our Suns luminosity is about 384 10 26 W. L 4π R2σT4 46 Using equation 46 all we need in order to.
We use the symbol L Sun to denote the Suns luminosity. Rather than use absolute values it is often convenient to compare the luminosity of a star L L Sun. A giant star has a luminosity of 300.
As a stars size increases its luminosity ___ as a stars temperature ___. The measurement of the luminosity of a star depends on the position of the observer. The luminosity of a star on the other hand is the amount of light it emits from its surface.
Apparent magnitude has no numeric value. As temperature decreases luminosity increases. As temperature decreases luminosity remains the same.
Ger has any living representatives _____ c. The brightest stars we can see with our eyes are best described as. Two stars can have the same luminosity but different apparent magnitudes depending on how far away they are.
Perhaps the easiest measurement to make of a star is its apparent brightness. A star with ten times the mass of the Sun will have a luminosity that is more than ten times the luminosity of the Sun. Use an X to plot the position of Canopus on the graph above based on its surface temperature and.
I am purposely being careful about my choice of words. The correct option is C. Compared to the temperature and luminosity of the star Polaris the star Sirius is 1 hotter and more luminous 3.
The Sun has a luminosity of about 4 1026 watts. The difference between luminosity and apparent. A stars luminosity is one factor in how long it lives.
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