http://tech.groups.yahoo.com/group/pg-astro/ Prairie Grass Astronomers Fri, 30 Oct 2009 21:26:53 GMT Russell B. Kaspar http://tech.groups.yahoo.com/group/pg-astro/message/880 http://tech.groups.yahoo.com/group/pg-astro/message/880 I sent an e-mail to John Rubacha, our Purdue contact after he requested confirmation on PGO outting. I indicated we will NOT be able to do the Purdue Lab at Fri, 16 Oct 2009 01:16:11 GMT leah sameh http://tech.groups.yahoo.com/group/pg-astro/message/879 http://tech.groups.yahoo.com/group/pg-astro/message/879 This is just a reminder that we have a brand new Orion 6" Starblast reflector we would like to sell at a very nice price. Our loss would be your gain. Weighing Fri, 16 Oct 2009 00:04:31 GMT http://tech.groups.yahoo.com/group/pg-astro/message/878 http://tech.groups.yahoo.com/group/pg-astro/message/878 Reminder from: pg-astro Yahoo! Group http://groups.yahoo.com/group/pg-astro/cal PGO Public Stargazing Night Saturday October 17, 2009 8:00 pm - 11:30 pm Fri, 09 Oct 2009 00:25:32 GMT http://tech.groups.yahoo.com/group/pg-astro/message/877 http://tech.groups.yahoo.com/group/pg-astro/message/877 Reminder from: pg-astro Yahoo! Group http://groups.yahoo.com/group/pg-astro/cal WVAS Open House Saturday October 10, 2009 8:30 pm - 10:30 pm (This event Thu, 08 Oct 2009 22:58:35 GMT http://tech.groups.yahoo.com/group/pg-astro/message/876 http://tech.groups.yahoo.com/group/pg-astro/message/876 Reminder from: pg-astro Yahoo! Group http://groups.yahoo.com/group/pg-astro/cal Wabash Valley Astronomical Society Meeting Saturday October 10, 2009 7:00 pm - Wed, 07 Oct 2009 11:07:33 GMT John Mahony http://tech.groups.yahoo.com/group/pg-astro/message/875 http://tech.groups.yahoo.com/group/pg-astro/message/875 http://www.skyandtelescope.com/news/63482922.html -John _________________________________________________________________ Hotmail: Trusted email with powerful Tue, 06 Oct 2009 02:11:03 GMT John Mahony http://tech.groups.yahoo.com/group/pg-astro/message/874 http://tech.groups.yahoo.com/group/pg-astro/message/874 Camp Cullom's annual "Graze 'n' Gaze" coincides with PGO's final public night of the year on Saturday Oct 17. Chili and s'mores and other extras will be Fri, 25 Sep 2009 06:46:58 GMT John Mahony http://tech.groups.yahoo.com/group/pg-astro/message/873 http://tech.groups.yahoo.com/group/pg-astro/message/873 Just a note on your terminology: A "wider" passband would normally mean that the range of wavelengths passed (around a particular wavelength) is wider. For Fri, 25 Sep 2009 01:45:04 GMT leah sameh http://tech.groups.yahoo.com/group/pg-astro/message/872 http://tech.groups.yahoo.com/group/pg-astro/message/872 Hi, John, Thanks as always for thorough answers. We have the Orion UltraBlock filter which, as you say, is a slightly wider band pass than the OIII. I've Thu, 24 Sep 2009 22:34:44 GMT John Mahony http://tech.groups.yahoo.com/group/pg-astro/message/871 http://tech.groups.yahoo.com/group/pg-astro/message/871 ... The Orion Ultrablock isn't quite an O-III filter. It also passes H-beta, which is also in the blue-green part of the spectrum. So it's in between an Thu, 24 Sep 2009 15:50:00 GMT ikc46118 http://tech.groups.yahoo.com/group/pg-astro/message/870 http://tech.groups.yahoo.com/group/pg-astro/message/870 My answers are yes, I don't know, and yes. I don't have a terrible problem with light pollution, but it's there; in fact, there is no place in Indiana that can Thu, 24 Sep 2009 01:00:38 GMT leah sameh http://tech.groups.yahoo.com/group/pg-astro/message/869 http://tech.groups.yahoo.com/group/pg-astro/message/869 A question for owners of OIII filters: Do you like having one? Are they useful on reflectors as small as 6"? Are they helpful for planetary nebulas, as I've Thu, 17 Sep 2009 00:26:34 GMT http://tech.groups.yahoo.com/group/pg-astro/message/868 http://tech.groups.yahoo.com/group/pg-astro/message/868 Reminder from: pg-astro Yahoo! Group http://groups.yahoo.com/group/pg-astro/cal PGO Public Stargazing Night Friday September 18, 2009 8:30 pm - 12:00 am Tue, 15 Sep 2009 20:55:43 GMT leah sameh http://tech.groups.yahoo.com/group/pg-astro/message/867 http://tech.groups.yahoo.com/group/pg-astro/message/867 To PGO fans, Early in April I bought an Orion Starblast 6" telescope.  I knew it would not be as heavy as a regular Dobsonian 6", but I am finding it to be a Fri, 11 Sep 2009 00:26:22 GMT http://tech.groups.yahoo.com/group/pg-astro/message/866 http://tech.groups.yahoo.com/group/pg-astro/message/866 Reminder from: pg-astro Yahoo! Group http://groups.yahoo.com/group/pg-astro/cal WVAS Open House Saturday September 12, 2009 8:30 pm - 10:30 pm (This event