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Re: My View of Venus
From: David Edwards
Date: 2004 Jun 8, 15:37 -0400
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 I looked for it this morning in my projected image but did not see it as it was described in the historical documents from the last transit.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. ------------------- Email sent using AnyEmail (http://netbula.com/anyemail/) Netbula LLC is not responsible for the content of this email
