3 Jan
2011
3 Jan
'11
20:06
<http://www.waa.at/hotspots/finsternisse/pse20110104.html> On Mon, Jan 3, 2011 at 20:51, Michael Hauser <awarewater@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!