Geo- magnetic storm in progress
On 8/8/12 06:17 , Joe from Kokomo wrote:
On 8/7/2012 12:46 PM, Beloved Leader wrote:
Thanks for the information. When I observed the transit of Venus back
in June, I used a really dark piece of glass from a welder's mask.
Whatever the number was, it was dark enough that I could not see
surrounding terrain.
Humph! Even an 8 or 10 is "dark enough that I could not see surrounding
terrain."...but that is not a high enough number.
The recommended number is #14...and they are additive if you can't find
a 14.
For the recent transit, my welding supply shop did not have a #14 but
they did have a #10 and #4, which I taped together.
Additional note: Put the #14 glass in FRONT (input side) of your
binoculars. If you put it on the output side, the concentrated heat
could leave you with a face full of shattered glass.
If you're near an observatory, they'll have viewing glasses, certified
for solar events, in the gift shop for about a buck.
They'll also have a public viewing on site.
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