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Does apparent magnitude refer to real luminosity?
No. Apparent magnitude (or luminosity) means how bright a star (or other object) looks to us; absolute magnitude (or luminosity) refers to how bright it really is.
What is an absolute magnitude?
An absolute magnitude is the luminosity of a celestial body if viewed from a distance of 10 parsecs (32.6 light years).
What would be the absolute magnitude and color of a main sequence star with a luminosity of 100?
Absolute magnitude = -0.5Colour would depend on it's temperature.
What does Hertzsprung-Russell diagram graph?
Horizontal Axis: Temperature in Kelvins (Hottest to coolest) Vertical Axis: Luminosity, absolute magnitude, or solar radius
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.
Which means the same as luminosity?
Absolute magnitude.
Does apparent magnitude refer to real luminosity?
No. Apparent magnitude (or luminosity) means how bright a star (or other object) looks to us; absolute magnitude (or luminosity) refers to how bright it really is.
What is thuban the stars luminosity?
Its absolute magnitude is -1.20.Its magnitude from our point of view is +3.65.
Explain why size is the only factor that determines the stars absolute magnitude?
The absolute magnitude is a measure of the star's luminosity hence the smaller the size the less the absolute magnitude.
What is an absolute magnitude?
An absolute magnitude is the luminosity of a celestial body if viewed from a distance of 10 parsecs (32.6 light years).
What would be the absolute magnitude and color of a main sequence star with a luminosity of 100?
Absolute magnitude = -0.5Colour would depend on it's temperature.
What is a synonym for absolute magnitude and apparent magnitude?
Apparent magnitude: How bright something looks to us. Absolute magnitude: How bright something really is - expressed as the apparent magnitude it would have at a standard distance.
Which star is giving off more light?
Those with a higher luminosity or a greater absolute magnitude.
What does the HR diagram depict?
the relationship between a star's luminosity, temperature, absolute magnitude, and spectral type.
What is the absolute and apparent magnitude of a giant star?
Magnitudes require distance and luminosity. Therefore a specific star is required.
What is the absolute magnitude of the Milky Way?
An estimation of the absolute magnitude is −20.9. See related question.
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.
