[AstroNet] Eclipse (from Samir)

Tue Nov 22 13:32:48 SAST 2011

Thanks Thembela for passing this on...

All the Best to all those who are going to be in the shadow of the Moon
on 25 Novemeber!  :)

  In addition to Prof. Pasachoff's suggestions, one may simply use a
small plain mirror to reflect the Sun onto a faraway wall. If the wall
is sufficiently distant (~10 meters), a nice big image of the Sun will
be formed on it, eclipsed or otherwise. This will be useful for
outreach.

http://www.arvindguptatoys.com/arvindgupta/toys/solareclipse01.jpg

  I will request Prof. Pasachoff to clarify in the release, what is
meant by "The central part of the shadow will pass 330 km below the
south pole". Please confirm if that means the darkest shadow will be in
Space assuming North as 'up'? If so, it will be a wonderful thing to get
people to imagine that. The simplified textbook diagrams always show the
whole shadow on the Earth. eg.

http://www.mreclipse.com/Special/image/SEDiagram1c.JPG

with regards

Samir Dhurde.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 Samir Dhurde,         Sci./Tech. Staff  - Public Outreach

       IUCAA, Pune University Campus, Pune - 411007, India

       Tel: (O)91-20-25604603         Fax:  91-20-25604699

       http://www.iucaa.ernet.in/~samir

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Claire Flanagan

Wits Planetarium

011-717-1391 / 9

076-744-4735

011-339-2926 (fax)

www.planetarium.co.za

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