Magnitude Scale

Note that brightness is another way to say the flux of light, in Watts per square meter, coming towards us. On this magnitude scale, a brightness ratio of 100 is set to correspond exactly to a magnitude

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Astronomy Visual Magnitude Scale for Stars & Planets

Visual brightness of stars, planets and other astronomical objects is based on the visual magnitude scale (Vo). Every integer increase in magnitude represents a 2.5 increase in brightness.

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Stellar magnitude, the scale to measure the brightness

A beginner''s guide to stellar magnitude, how astronomers measure a star''s brightness and which are the brightest objects in the sky.

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Star Magnitudes

First magnitude stars are corrected across the scale of 1, 0, -1 with the brightest star Sirius at -1.44. The scale increases in brightness with negative numbers. For example, the brightest planet Venus varies

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The Stellar Magnitude Scale

Astronomers measure the brightness of a star in the sky using a magnitude scale. On this scale, the brightest objects have the SMALLEST number and the faintest objects have the LARGEST numbers.

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5: The Magnitude Scale

Hipparchus of Rhodes compiled a catalog of about 850 stars. He described the brightness of each star by placing it in one of six categories, which one could call "brighest, bright, not so bright, not so faint,

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Magnitude Scale

Magntiude normally refers to the brightness of an object if it were a point source. A celestial object, such as a star cluster, nebula, or galaxy, however, spreads its light over an appreciable area, making it

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The astronomical magnitude scale

The scale below is given as an instructive tool, to give a general idea of how the magnitude scale works.

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Magnitude (astronomy)

In astronomy, magnitude is a measure of the brightness of an object, usually in a defined passband. An imprecise but systematic determination of the magnitude of objects was introduced in ancient times by Hipparchus. Magnitude values do not have a unit. The scale is logarithmic and defined such that a magnitude 1 star is exactly 100 times brighter than a magnitude 6 star. Thus each st

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What is stellar magnitude?

In the spirit of Hipparchus and Ptolemy, the modern-day charts of the constellation Canis Major above and the constellation Virgo below scale stars by magnitude.

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