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    Of the significance of astronomy, luminosity, and astrology

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    When looking at the night sky, you can see the light of different stars. If one star looks brighter than another, is it necessarily brighter? Explain.

    Astronomical discoveries are imperative to science. How are they significant to our personal lives? Explain.

    Astrology is the study that believes and attempts to interpret the powers of heavenly bodies on human affairs. Why do you think astrology is so popular around the world, although it has failed all scientific tests of validity?

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    1) The first question deals with Apparent Magnitude (how a star looks to us on Earth) versus Luminosity (a function of the actual energy output. Apparent Magnitude is moderated by the distance to the star as per the loss of energy over distance as dictated by the inverse square law. That is, a bright object far away will look less bright than a fainter object close up in a mathematically predictable fashion.

    Luminosity however, depends on two variable: A) temperature - the hotter a star is, the larger quantum of energy and the shorter the wavelength (the bluer it is - a cooler star would be redder) and size - the bigger a star is the more surface area there is to by luminous.

    Astronomers actually use a contrived description - absolute magnitude - to describe ...

    Solution Summary

    answer (with references) deals briefly with three questions on the title subjects