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How does the brightness of a star depend on its distance from us? (Beginner) ... (General questions | Distances | Stellar remnants | Stargazing | "Measuring" the stars | Star formation | Nuclear burning)
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curious.astro.cornell.edu/stars.php
curious.astro.cornell.edu/stars.php
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A basic observable quantity for a star is its brightness. Because stars can have a very broad ... Notice the very important point that I can determine the apparent magnitude m of a star simply by measuring how bright it appears to be, but to determine the absolute magnitude M the distance to the star must also be known.
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csep10.phys.utk.edu/astr162/lect/stars/magnitudes.html
csep10.phys.utk.edu/astr162/lect/stars/magnitudes.html
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Astronomers "pretend" to line up stars exactly 10 parsecs (about 32.6 light years) away from Earth. They then figure out how bright each star would look. They call that brightness the star's absolute magnitude. Our Sun is not an especially bright star.
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www.windows.ucar.edu/tour/link=/the_universe/Stars/magn...
www.windows.ucar.edu/tour/link=/the_universe/Stars/magnitude_scale.html
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Inverse-Square Law - the apparent brightness ... (Intensity) of a star decreases with increasing ... distance from Earth...
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www.physics.sfasu.edu/friedfeld/ast105/chapter11_files/...
www.physics.sfasu.edu/friedfeld/ast105/chapter11_files/slide0018.htm
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Another popular technique looks for periodic dips in a star's brightness that occur when an orbiting planet passes in front of, or transits, its star. ... Indeed, even though the newly found planet lies relatively far away from its star, measuring changes in the star's position was difficult.
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www.newscientist.com/article/dn17208-exoplanet-found-by...
www.newscientist.com/article/dn17208-exoplanet-found-by-measuring-stars-sideways-shift.html
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Trigonometric parallax is used to measure the distances of the nearby stars. The stars are so far away that observing a star from opposite sides of the Earth would produce a parallax angle much, much too small to detect.
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www.astronomynotes.com/starprop/s2.htm
www.astronomynotes.com/starprop/s2.htm
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Star Brightness Magnitude; Human Eye; Effect of Integration in StellaCam; Hot Pixels; Imaging Chip ; Mintron; SAC/Mintron; Watec; ASTROVID; Mallin Cam; f Number and Pixel Size; Spectral Response; Links Stellar Time Keeping;
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www.prc68.com/I/Mag.shtml
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CiteSeerX - Document Details (Isaac Councill, Lee Giles): The #rst time simultaneous measurements of sodium column density and the absolute #ux from a sodium laser guide star, created by a monochromatic 3 W cw laser, tuned to the peak of the sodium D 2 hyper#ne structure, were conducted at the MMT and CFA 60 inch telescope ...
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citeseer.ist.psu.edu/298354.html
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Measuring a Star Cluster's Age and Distance ... This technique is described in detail in a separate exercise, Measuring Brightness , but can be summed up in the following steps.
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www.astro.physik.uni-goettingen.de/~hessman/ImageJ/Book...
www.astro.physik.uni-goettingen.de/~hessman/ImageJ/Book/Measuring%20a%20Star%20Cluster's%20Age%20and%20Distance/index.html
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