August 2003 - Utah-Astronomy - mailman.xmission.com

RE: [Utah-astronomy] Magazine preference
by Kim Hyatt 13 Aug '03

13 Aug '03

I used to subscribe to both but I gave up Astronomy. More info in S&T, more timely, and Astronomy seemed to be mostly the same information (just less of it), anyway. My opinion. -----Original Message----- From: Chuck Hards [mailto:chuckhards@yahoo.com] Sent: Wednesday, August 13, 2003 11:35 AM To: Utah-Astro Subject: [Utah-astronomy] Magazine preference I've noticed that many people in this area don't subscribe to Sky & Telescope, and prefer Astronomy. Anyone in this position care to elaborate on why? C. __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy(a)mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy

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RE: [Utah-astronomy] Magazine preference
by Lambert, Aaron 13 Aug '03

13 Aug '03

I think that is why some people prefer Astronomy. I have both and reading S&T sometimes makes my brain hurt whereas the Astronomy articles are more on my level (being a newbie to astronomy). Aaron > -----Original Message----- > From: Ken Warner [mailto:KillerKen@killerken.com] > Sent: Wednesday, August 13, 2003 12:28 PM > To: 'Visit http://www.utahastronomy.com for the photo gallery.' > Subject: RE: [Utah-astronomy] Magazine preference > > > I thought it was the other way around. Sky and Telescope > seems to me to > have more in depth articles and is more > technical than Astronomy. I look at Astronomy for the pretty pictures > in the gallery. > > Ken > > -----Original Message----- > From: utah-astronomy-bounces(a)mailman.xmission.com > [mailto:utah-astronomy-bounces@mailman.xmission.com] On > Behalf Of Chuck > Hards > Sent: Wednesday, August 13, 2003 11:35 AM > To: Utah-Astro > Subject: [Utah-astronomy] Magazine preference > > > I've noticed that many people in this area don't > subscribe to Sky & Telescope, and prefer Astronomy. > Anyone in this position care to elaborate on why? > > C. >

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Magazine preference
by Chuck Hards 13 Aug '03

13 Aug '03

I've noticed that many people in this area don't subscribe to Sky & Telescope, and prefer Astronomy. Anyone in this position care to elaborate on why? C. __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com

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Fwd: [Utah-astronomy] Galileo’s
by David L Bennett 13 Aug '03

13 Aug '03

> Jim, > > Tell me if you see any bears. I'd love a pair of those to watch the > wildlife. > We saw alot of moose up there last trip. You can't get too close to the > wildlife or they will charge. Have fun. > > Debbie > The Colorado State Department of Fish and Wildlife is advising hikers, hunters, fishermen, and golfers to take extra precautions and be on the alert for bears while in the Dillon, Breckenridge, and Keystone area. They advise people to wear noise-producing devices such as little bells on their clothing to alert but not startle the bears unexpectedly. They also advise you to carry pepper spray in case of an encounter with a bear. It is also a good idea to watch for signs of bear activity. People should be able to recognize the difference between black bear and grizzly bear droppings. Black bear droppings are smaller and contain berries and possibly squirrel fur. Grizzly bear droppings have bells in them and smell like pepper spray. *Courtesy of Kathleen Warner

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Re: [Utah-astronomy] Galileo’s
by UTAHDEB＠aol.com 13 Aug '03

13 Aug '03

Jim, Tell me if you see any bears. I'd love a pair of those to watch the wildlife. We saw alot of moose up there last trip. You can't get too close to the wildlife or they will charge. Have fun. Debbie

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Re: [Utah-astronomy] Lasers and collimation questions
by UTAHDEB＠aol.com 13 Aug '03

13 Aug '03

Jim, I can get you a copy of that table. What page is it on? My friend Harlan has the book. Debbie

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RE: [Utah-astronomy] Galileo?s
by Kim Hyatt 13 Aug '03

13 Aug '03

Jim, I just returned from Yellowston. You may be luckier, but while I was ther last week, the air was horribly smoky due to wild fires in the park. I didn't even try to do any observing. -----Original Message----- From: Jim Gibson [mailto:xajax99@yahoo.com] Sent: Wednesday, August 13, 2003 10:27 AM To: Visit http://www.utahastronomy.com for the photo gallery. Subject: [Utah-astronomy] Galileo?s I am on my way backpacking and fly fishing for a week in Yellowstone. I am taking my Galileo's so I can look at the stars at night. It ought to be dark there. In an effort to keep the weight down in my backpack I am going to wear the Galileo's around my neck. I ain't dumb. ><))))'> Jim _____ Do you Yahoo!? Yahoo! <http://us.rd.yahoo.com/evt=10469/*http://sitebuilder.yahoo.com> SiteBuilder - Free, easy-to-use web site design software

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RE: [Utah-astronomy] Lasers and collimation questions
by Kim Hyatt 13 Aug '03

13 Aug '03

Couldn't one collimate with a centered secondary with a center dot then simply offset afterwards the required amount, or will that screw-up the collimation? -----Original Message----- From: Chuck Hards [mailto:chuckhards@yahoo.com] Sent: Tuesday, August 12, 2003 9:00 PM To: Visit http://www.utahastronomy.com for the photo gallery. Subject: RE: [Utah-astronomy] Lasers and collimation questions Someone earlier in this thread mentioned a secondary mirror template for center-dotting purposes. Remember that if you have a fast system, the diagonal will not be centered. It must be off-centered slightly in order to provide an evenly illuminated focal plane. Hopefully the template will take this into account, I'm not familiar with the book mentioned. C. __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy(a)mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy

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Perseids
by Patrick Wiggins 13 Aug '03

13 Aug '03

Was just out for my morning walk and caught a very bright Perseid out of the corner of my eye at 02:59. Weird thing is when I turned to look at where it had been there was what sure looked like solid cloud cover. Wondering if it was possible that I could have seen a meteor pass *under* a cloud I waited for the sonic boom. No boom. One heck of an optical illusion, I guess. BTW, that was only the third Perseid I'd seen during a number of trips outside. With cloud cover 50% or less I thought I'd see more. Well, out to look for more. Patrick

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RE: [Utah-astronomy] Lasers and collimation questions
by Paul Witte 13 Aug '03

13 Aug '03

I actually have no trouble using my Cheshire after dark. I took a white piece of paper & taped it over the outside opening. Then I shine my red flashlight on the paper. The paper diffuses the light enough to create an evenly illuminated background to see the centerspot edges. In the book that came with the collimation tools "Perspectives on Collimation" they actually recommend you re-collimate every 1-2 hours to compensate for thermal variations as the mirror cools. It seems hard to believe that slight thermal variations would make enough of a difference as to affect collimation, am I wrong on this? --Paul ---------- From: Josephine Grahn Sent: Tuesday, August 12, 2003 7:13 PM To: Visit http://www.utahastronomy.com for the photo gallery. Subject: RE: [Utah-astronomy] Lasers and collimation questions Don et al., I highly suggest that people read and spend some serious time at the Mel Bartels website. It will clear up a lot of misconceptions, and get you well on your way to a properly collimated scope. http://zebu.uoregon.edu/~mbartels/kolli/kolli.html It's best to use a sight tube to get you very close on the diagonal orientation. Then a simple (non-holographic) laser can be used to fine tune diagonal orientation and for adjusting the tilt of the primary. Perhaps once or twice in six years that we've tried, has the seeing been good enough to tweak the collimation of our 16" scope at adequately high power; and never good enough for the 24". Lasers are great for collimation because they can be used at night; but the assumption is made that the mechanical center of the mirror is the optical center. A Cheshire is a great tool, but not convenient if you want to tweak collimation after dark. A laser is a worthwhile addition to your toolkit. I hate to see people leaving with the idea that lasers can't do the job, they can do an excellent job. Jo Grahn _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy(a)mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy

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