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| 5/26 |
| 2002/6/10-11 [Computer/SW/Editors/IDE, Science/Space] UID:25059 Activity:high |
6/10 Eclipse Today:
http://sfgate.com/cgi-bin/article.cgi?f=/c/a/2002/06/10/MN120999.DTL
Anyone know where to get eclipse glasses in the south bay (mnt. view
san jose area)?
\_ I wonder how many people blew out their digital camera CCD trying
to photograph this thing.
\_ I'm going out to the Great Circle to celebrate the New Cycle.
\_ Whole Hippie Online sells them. They have a store in SJ next to
"Get A Job You Fucking Hippie" Resume Service
\- er can you actually "blow out" a CCD? ... i mean short of
shooting a laser into your camera.
\_ The radio said for Bay Area about 60% of the sun will be obscured,
but people won't notice any dimming of the sun light. I don't
understand why it won't get any darker than usual when more than
half of the sun is obscured.
\_ take physics 7C
\_ oh, really? i'm about half way through a phd in physics,
and it's not obvious to me, but i guess i don't have
your godlike insight.
\- i think it is eye reaction perhaps. i think between
aperture change and some difference in processing high
contrast probably explains it. e.g. i think often a room
with a naked lightbulb looks darker than a shaded light.
however if you use a light meter, you will proibably see
the reverse. if anyone own a light meter, see if you can
measure a difference. a spot meter on a newish camera
might do it too. --psb
\- actualy i thought about it some more and i think the
eclipse simply doesnt block a large area of the light
inclident on the earth. would you notice the light
level change in a room if a disk blocked only the
area of the lightbulb ... hard to explain without a
pciture. ok tnx.
\_ Actually a better analogy would be a disk
blocking part of a spotlight, because in the
lightbulb case you'd be getting much of the light
reflected off walls. At any rate, I think the
\_ Try the SF Exploratorium gift shop. It's located at the Palace of
Fine Arts. http://www.exploratorium.org -dans
\_ Hey dans, I heard you were a 31337 raver kidd13. Who's throwing
3133+ logout parties these days? Any pics?
\_ Hi Paolo. Yes I have pics, yes they're going up when I
get the chance. But first I have to crack open photoshop
and filter out that nasty blue shift your camera introduced
into them. Say, seeing as you live across the hall from me,
why are you asking this on the motd? Seems, um, inefficient.
light being scattered by the atmosphere
contributes a lot to the perceived brightness. I
do recall the local brightness not changing very
much until only a few seconds around totality.
-geordan
\_ The sun is just really really really bright.
\_ well it seemed quite a bit dimmer to me at 6pmish, the peak
of the eclipse. Though I doubt I'd have noticed it if not
that I knew there was an eclipse going on. -ERic
\_ http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2002/06/11/BA130389.DTL
About 8 paragraphs from the end:
One question on everyone's mind was whether the light actually
got dimmer, so resourceful Daily Californian photographers Ian
Buchanan and Robert Katzer took light readings near the peak of
the eclipse and half an hour later.
The camera said it needed a 1/250 of a second near the peak of
the eclipse but only 1/640 half an hour later -- proving that the
eclipse did block some light, even if most people couldn't tell. |
| 5/26 |
|
| sfgate.com/cgi-bin/article.cgi?f=/c/a/2002/06/10/MN120999.DTL Sunset will prevent the eclipse from reaching the East Coast. The extent of the eclipse will range from 20 percent in the Great Lakes region to up to 80 percent in Southern California. Punch a small hole in one piece of cardboard and position it so sunlight passes through the hole onto the second piece of cardboard. Experiment with different-sized holes and the distance between the two pieces of cardboard to get the best focus. View the projected image on the cardboard only - do not look at the sun through the pinhole! Telescope projection: For a sharper and bigger image, use a telescope or binoculars to focus the image on the cardboard. Solar filter: For direct viewing of the sun, use special eclipse glasses outfitted with solar filters - available in some science and astronomy stores - or rectangular welder's glass of shade 14 or higher. Do not use regular sunglasses - they won't protect your eyes. |
| www.exploratorium.org Science of Music Explore the science of music, through online exhibits, movies, and questions. Learn about 11 the transit of Venus - what it is, what you'll see, and why it's important. Origins Explore the places, people, tools, and ideas behind the 15 origins of matter, the universe, and life itself. What do you really know about what you 17 see? And what 18 traits of life do all organisms share? Find out how surfing the Web can help you 22 surf the waves, make forecasts, and more. New publication! Try This! Volunteer! Check out the 45 events calendar for 46 film screenings, 47 live Webcasts, and other 48 public programs. Need 49 Directions? About Us | 51 Donations | 52 Membership | 53 Privacy Policy | 54 Use Policy | 55 Contact Info Exploratorium | The museum of science, art and human perception References 1. |
| www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2002/06/11/BA130389.DTL John, Chronicle Staff Writers / -- The Associated Press contributed to this report. Though he attracted an enthusiastic crowd, not everyone was enthralled. He'd brought a welder's mask whose lens, sure enough, showed the sun to be green. The director of the planetarium at the Lawrence Hall of Science, Alan Gould, pulled out a pegboard whose holes showed hundreds of suns with moon bites missing on whatever happened to be behind it. So Albany High School science teacher George Fosselius jumped down behind it and had his wife take a picture of the dozen eclipses on his face, a trick quickly followed by others. Others found that the eclipse made their shadows behave in an odd manner. One question on everyone's mind was whether the light actually got dimmer, so resourceful Daily Californian photographers Ian Buchanan and Robert Katzer took light readings near the peak of the eclipse and half an hour later. The camera said it needed a 1/250 of a second near the peak of the eclipse but only 1/640 half an hour later -- proving that the eclipse did block some light, even if most people couldn't tell. In Mexico's Baja California, the sun's center was completely blocked out, to reveal a fiery doughnut-shape of sunlight. In San Diego, the moon blocked about three-fourths of the sun. Paul Doherty, a senior scientist at San Francisco's Exploratorium, which broadcast a live picture of the eclipse on its Web site, said that the Bay Area wouldn't see the likes of Monday's event for years to come. The next total solar eclipse viewable here will be in 2017. |