This paper explores and quantifies the sources and effects of light scattering from the
New Worlds Observer Starshade into the observing telescope. We will discuss the
calculation of the scattered light level and its effect on
extra-solar planet detection. We
consider light scattered off the starshade from the Sun, the Earth, the Moon, the solarsystem
planets, zodiacal dust, and the galactic background. We will treat holes caused by
micrometeorites and other orbital debris as a separated case.
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