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What correctly describes the relationship between the luminosity of two stars that have the same radius?
The star that is hotter will have a higher luminosity.
Why are most visual binary stars of low luminosity?
If the binary stars were of too high luminosity it would be impossible to distinguish the two through vision alone. Therefore most visual binary stars are of low luminosity.
What is the absolute magnitude of this star m equals 6?
Magnitude = m - 5 (log10D) - 1) Where D is the star's luminosity distance in parsecs ----------------------------------------------------------------- In order to calculate a star's absolute magnitude, we need two pieces of information: -- its apparent magnitude, i.e., how bright it appears from Earth, and -- its distance from us.
Why can certain stars sometimes be identified as eclipsing bininary stars?
A binary star consists of two stars gravitationally locked together in a mutual orbit. If the plane of that orbit is in line with us, as observers, then occasionally, one star will eclipse the other, producing a change in luminosity as one star is briefly blocked from view.
The diffence in brightness between two stars is related to the?
Their distance away from you and their intrinsic luminosity.
What two factors determine how bright a star looks like from earth?
It's luminosity and it's distance from Earth
What two factors determine how bright a star looks from earth?
The two factors are temperature and luminosity based on the HR diagram. The stage of the star in its life cycle also plays a key part.
What describes the relationship between the luminosity of two stars that have the same radius?
The star that is hotter will have a higher luminosity.
What correctly describes the relationship between the luminosity of two stars that have the same radius?
The star that is hotter will have a higher 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 is the luminosity of the star regulus?
In astronomy, Luminosity is the amount of energy a body radiates per unit time. The luminosity of stars is measured in two forms: apparent (counting visible light only) and bolometric (total radiant energy); a bolometer is an instrument that measures radiant energy over a wide band by absorption and measurement of heating. When not qualified, luminosity means bolometric luminosity, which is measured in the SI units watts, or in terms of solar luminosities, ; that is, how many times as much energy the object radiates than the Sun, whose luminosity is 3.846×1026 W. Luminosity is an intrinsic constant independent of distance, and is measured as absolute magnitude corresponding to apparent luminosity, or bolometric magnitude corresponding to bolometric luminosity. In contrast, apparent brightness is related to distance by an inverse square law. Visible brightness is usually measured by apparent magnitude, which is on a logarithmic scale. In measuring star brightnesses, visible luminosity (not total luminosity at all wave lengths), apparent magnitude (visible brightness), and distance are interrelated parameters. If you know two, you can determine the third. Since the sun's luminosity is the standard, comparing these parameters with the sun's apparent magnitude and distance is the easiest way to remember how to convert between them.
What are two factors that determine the brightness of a star?
distance from the sun and the age of the star
What are two properties that are used to characterize a star?
The colors and lines in the spectrum of a star indicate the elements that make up the star.
What two properties determine how strong of a force gravity will play on two objects?
The two properties that determine the force of gravity between two objects are the product of the masses (mM) and the square of the distance between the masses,r: F= GmM/r^2
The measure of a stars brightness is called its what?
Scientists actually use two measurements to identify a star's brightness. One is luminosity, or the energy that star puts out. Another is magnitude, or the amount of light a star puts out.
Suppose there are two stars A and B with the same luminosity. If star A is larger then star B then we can conclude that?
A The temperature of star B is lower B The temperature of star A is lower C Star A is more massive D Star B is more massive E Not enough information to conclude anything
Which two properties determine an objects acceleration?
It's mass and the net force acting on it
