Twilight phenomena in the atmosphere of Venus during the 2004 inferior conjunction
نویسنده
چکیده
Twilight phenomena of Venus are peculiar aspects visible in proximity of the inferior conjunctions of the planet. They include the refraction image of the Sun that has been observed during the planet transits, and the cusp extensions observable at greater elongations. Those two phenomena have deeply different origins, the first being ascribed to refraction, the second to scattering by a thin layer of aerosols. In the following we briefly summarize the historical record of observations, giving some physical considerations and practical advices for observation close to the June 2004 Venus conjunction with the Sun.
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