[Metalab] Camera obscura link / tomorrow's partial solar eclipse / we don't even need a lens!

[Michael Hauser]

<http://www.waa.at/hotspots/finsternisse/pse20110104.html>

On Mon, Jan 3, 2011 at 20:51, Michael Hauser <awarewater at gmail.com> wrote:
> Morgen partielle Sonnenfinsternis!!!
>
> "In 13th-century England Roger Bacon described the use of a camera
> obscura for the safe observation of solar eclipses."
> from: <http://en.wikipedia.org/wiki/Camera_obscura>
>
> ein schuhkarton genügt also...
>
> have fun and do not stare into the sun!
>