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Transit of Venus today 5jun12


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Initial post: Jun 5, 2012 9:27:44 AM PDT
barbW says:
TRANSIT OF VENUS: The historic 2012 Transit of Venus commences today, June 5th, at 3:09 pm Pacific Daylight Time (22:09 UT). Spaceweather.com is covering the event with observing tips, a real-time photo gallery, and links to live webcasts from around the world. Extraordinary photos of Venus taken during the hours leading up to the transit are also featured on today's edition of http://spaceweather.com .

Does anyone hear remember how we would determine without instruments - our distance to the Sun and its size? I used to know how they did it.. Thanks

Posted on Jun 5, 2012 9:39:16 AM PDT
Brian Curtis says:
Distance:
http://www.eso.org/public/outreach/eduoff/aol/market/collaboration/solpar/#chap3

And once you have the distance, you can easily calcluate the size:
http://www.physics.sfasu.edu/astro/courses/ast105/homeobserving/sunsize.htm

In reply to an earlier post on Jun 5, 2012 11:13:38 AM PDT
barbW says:
OK thanks (other good info there too), I guess we can never get close to the true distance without a telescope. I must not have remembered correctly.
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Discussion in:  Science forum
Participants:  2
Total posts:  3
Initial post:  Jun 5, 2012
Latest post:  Jun 5, 2012

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