You know how a 45 degree erect prism diagonal can degrade the image so much. How is the performance of a binoviewer against a 45 degree erect diagonal as far...

I'm looking at the BBC website, and they have a story about larger telescopes (mankind has aperture fever) coming on-line at various future dates. One...

We all know those cute little computer symbols called "emoticons," whe :) means a smile and :( is a frown. Sometimes these are represented by :-)...

Hi everybody, Does anyone who posts here have, or has seen one of the Dobs made by David Lukehurst? I am looking to recommission a Newtonian mirror set and...

I posted a while back requesting opinions about differences (preferences really) between a good MAK and a good APO. I really appreciated the discussion...

MicroSky is a free virtual planetarium for your cell phone. Somehow it crams the cosmos into 28kB. Well at least 2,500,000 stars, 8,000 deep-sky objects, 88...

Space Weather Message Code: ALTK05 Serial Number: 465 Issue Time: 2005 Apr 12 0117 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2005 Apr 12 0115...

The solar wind magnetic field has been southward for 8 hours and the velocity is climbing steadily. There should be aurora visible from southern Scandinavia,...

That means you, Mr. Chris L. Peterson -- and anyone else who would like to jump in. Quick, because I was late getting home today and the sky looks crystal...

http://news.bbc.co.uk/2/hi/science/nature/4422555.stm Shneor

Hello, I have seen some very good images with much less effort (regarding exposure time), nevertheless I'd like to show you my images for...

Recently there was an article in S&T about M-102 ans sugested it should be replaced by an NGC. Does anyone remember the NGC number. I cant find the article. ...

I've been unable to rouse www.skyeng.com for several days now. Then I found this: http://www.astrosystems.biz/dsc.htm Version 4 of SC will be flash...

I have a 10 DOB and am looking for a smaller scope to bring when I go camping, road trips, etc. I am considering the Orion 80mm Ed apo. I'd like a computerized...

Tim Auton wrote (of the number of Muslims in the world): Most sources have it at 1.5bn I've read 1 billion, with 2 billion Christians (of all...

I do most of my observing with a set of 15x70 binoculars. I also use a Celestron 80mm Wide View spotting scope for solar system objects and for terrestrial...

My new Orion catalog arrived today, and I was curious if anyone had heard anything about their new "Stratus" eyepieces? 68deg FOV, 8-element multi-coated,...

It has been about a year now since I last cleaned the outside of my two main scopes. Little chips in the paint on the dobsonian and smudges and trace amounts...

Anonymous wrote: their ways. Nothing anyone who thinks outside the box has irrefutably demonstrated otherwise has *ever* had any affect whatsoever on...

Ï "Victor Roberts" Ýãñáøå óôï ìÞíõìá ... Why does the architectural lighting...