info
Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss
solar 'telescope' hack
32 views
Skip to first unread message
Big Bad Bob
Jun 5, 2012, 7:08:07 PM6/5/12
to
wanted to see venus transit, tried 'pinhole' methods, holding up
magnifiying glass and loupe lenses, various combinations, no go.
Couldn't see sun well enough through 2 pairs of sunglasses (twisted 90
degrees so minimal light passes through, polarized lenses) so I tried
looking through binoculars - and it worked acceptably when I looked
through ONE side of the binoculars and put the 2 sunglass lenses (90
degrees apart) on the "business" end of the binoculars. I could see
what I though should be venus' shadow, a small black circle near the
"top" of the sun. No sunspots, though.
"live" SOHO shot here, but still hasn't updated as of this posting...
http://sohowww.nascom.nasa.gov/data/realtime/hmi_igr/1024/latest.html
magnifiying glass and loupe lenses, various combinations, no go.
Couldn't see sun well enough through 2 pairs of sunglasses (twisted 90
degrees so minimal light passes through, polarized lenses) so I tried
looking through binoculars - and it worked acceptably when I looked
through ONE side of the binoculars and put the 2 sunglass lenses (90
degrees apart) on the "business" end of the binoculars. I could see
what I though should be venus' shadow, a small black circle near the
"top" of the sun. No sunspots, though.
"live" SOHO shot here, but still hasn't updated as of this posting...
http://sohowww.nascom.nasa.gov/data/realtime/hmi_igr/1024/latest.html
0 new messages