Air mass

  • Astronomy

    Air mass

    Posted by Encyclios on May 17, 2023 at 1:23 PM

    In astronomy, air mass (or airmass) is a measure of the amount of air along the line of sight when observing a star or other celestial source from below Earth’s atmosphere (Green 1992). It is formulated as the integral of air density along the light ray.

    The Air Mass is the path length which light takes through the atmosphere normalized to the shortest possible path length (that is, when the sun is directly overhead). The Air Mass quantifies the reduction in the power of light as it passes through the atmosphere and is absorbed by air and dust.

    Encyclios replied 3 weeks, 2 days ago 1 Member · 0 Replies
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