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    Re: My View of Venus
    From: David Edwards
    Date: 2004 Jun 8, 15:37 -0400

            The black drop effect is a meniscus aberration which occurs as the
    planet enters and exits the sun's disk.  It is caused by the Earth's
    atmosphere.  I looked for it this morning in my projected image but did not
    see it as it was described in the historical documents from the last
    transit.  Because the most important measurement used to determine the
    distance to Venus was when it touched the suns edge this effect was a
    terrible hindrance to the 18th and 19th century observers.
    
    -----Original Message-----
    From: Navigation Mailing List [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM]
    On Behalf Of Robert Eno
    Sent: Tuesday, June 08, 2004 9:54 AM
    To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
    Subject: Re: My View of Venus
    
    
    Ok. I will have to admit complete ignorance. Please explain what is meant by
    "blackdrop" then I might be able to tell you if I so it or not!
    
    Robert
    
    >Sadly I was too far West to see it. Did anyone see the "blackdrop
    >effect"?
    >
    >Ken Muldrew.
    
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