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en.wikipedia.org/wiki/Magnitude_(astronomy)

In astronomy, magnitude is a logarithmic measure of the brightness of an object, measured in a ... The brighter an object appears, the lower the value of its magnitude, with the brightest objects reaching negative values. ... classified stars by their apparent brightness, which they saw as size (magnitude means "bigness, size").

www.space.com/21640-star-luminosity-and-magnitude.html

Jun 19, 2013 ... The brightness of a star is measured several ways: how it appears from ... terms of apparent magnitude (how bright the star appears from Earth) and ... them by how bright they appear — the brightest stars were 'magnitude 1', ...

www.e-education.psu.edu/astro801/content/l4_p5.html

If you notice, the magnitude system is therefore backwards–the brighter a star is, ... That is, the apparent magnitude of a star is its magnitude measured on Earth. ... magnitudes to classify stars based on how they would appear if they were all at ...

curious.astro.cornell.edu/about-us/82-the-universe/stars-and-star-clusters/measuring-the-stars/391-how-do-astronomers-measure-the-brightness-of-stars-intermediate

Jun 27, 2015 ... For instance, from Saturn, the Sun will not appear like the brilliant Sun of the Earth, but ... So, to measure the brightness (the scientific term is luminosity) of ... Then, as one knows the distance to the star, one can determine how ...

curious.astro.cornell.edu/physics/82-the-universe/stars-and-star-clusters/measuring-the-stars/392-how-does-the-brightness-of-a-star-depend-on-its-distance-from-us-beginner

Jun 27, 2015 ... The apparent brightness of a star is proportional to 1 divided by its distance squared. ... as bright; if you moved it four times the distance, it would appear 1/16 as bright. ... (Intermediate) · How do astronomers measure the brightness of stars ? ... Did life originate on Earth, or did it come from somewhere else?

astro.physics.uiowa.edu/~kaaret/s09/L10_stars.pdf

Stars. • Flux and luminosity. • Brightness of stars. • Spectrum of light. • Temperature and color/ ... telescope) we can measure the light produced by the star – the total ... Which star appears brighter to the observer? d. 2d. L ... properties of star, independent of how far they happen to be from Earth, we use “ absolute magnitude”.

astronomy.nmsu.edu/geas/lectures/lecture19/slide06.html

We can measure and compare the intrinsic and apparent brightnesses of stars using the ... First-magnitude stars are those which appear the brightest from Earth , ... We can compute colors for stars by comparing how bright they appear at ...

www.ifa.hawaii.edu/users/lin/ast110-6/ast110-21.ppt

The brightness of the a star as it appears to our eyes (or detectors). It depends on both the luminosity AND distance between the star and the Earth. ... Apparent magnitude describes the relative brightness of objects as they appears in sky. ... We can measure the temperature of the stars or any object by studying the shape of ...

www.skyandtelescope.com/astronomy-resources/the-stellar-magnitude-system

Aug 1, 2006 ... Most ways of counting and measuring things work logically. ... They had already determined that a 1st-magnitude star shines with about .... Up to now we've been dealing only with apparent magnitudes — how bright things look from Earth. ... the closest star to the solar system, would appear to be magnitude ...