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| The final word on the Pianka story will be issued by the Executive Director shortly. |
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Capturing
the Elusive Green Flash by Steve
Cullen
After trying to capture the elusive
"green flash" for many years, I was
finally successful on a trip to Hawaii in mid-October
2005. In fact, I was able to capture not just
a single image (Fig. 1) but a 10-frame sequence
(Fig. 2) showing the flash from beginning to end
over a 5-second period.
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The
Sperling Files: Overexposures for Discovery
and Fame
Norman Sperling
Imaging technology is rapidly improving
and cheapening. From current astrophotography
guides, determine “recommended” exposures
for accessible deep-sky objects. Then
take time exposures that are many times
longer than the recommended amount - up
to the sky-fogging limit.
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We have read in the media that
Professor Pianka has received death threats
regarding as a result of media reports about
his speech at the Texas Academy of Science.
And I also want to inform our readers that I
have received via email such a threat as a result
of my editorial about his speech as well as
obscene and abusive email and phone calls.
I want to make this crystal clear: The Society
for Amateur Scientists deplores all threats
or use of intimidation for any purpose whatsoever.
If any information comes to our attention regarding
who is taking this despicable action against
Professor Pianka we shall immediately forward
it to the proper authorities with our fervent
hope that they will prosecute the perpetrators
to the fullest extent of the law.
Shawn Carlson, Ph.D.
Founder and Executive Director
Society for Amateur Scientists
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How
to Prepare
Abrasive Powders
Alvaro Amaro de Azevedo
Arrange about 200 g of washed
dried sand and put it in a ball mill (see here
or search here).
Let it crush for one hour or so and then transfer
the flour to a 200 ml glass.
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