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Captured by
Douglas Rollain

M20 Trifid Nebula in LRGBHa

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Posts Made By: Bill Wheaton

April 4, 2008 04:59 PM Forum: AstroMart FAQ

"Workspace Friendly" colors

Posted By Bill Wheaton

Is there a way to change the color scheme of this website and make it stick? I like to monitor it during the day here from work, but the first page of the classifieds have those awful gaudy obvious yellow advertising rows displayed that can be seen from 5 cubicals away. As soon as I get to that page I have to scroll them away from view.

Are there any plans to clean it up? Even the line of emoticons here in this forum is a dead give away that I am goofing off. I mean really, emoticons are so 2003.

-Bill

April 8, 2008 07:44 PM Forum: Beginning Astronomy?

What does "ED" mean?

Posted By Bill Wheaton

I'm new (obviously). I see "ED" a lot. What does it mean?

April 14, 2008 04:59 AM Forum: Telescope Making

making the secondary diagonal

Posted By Bill Wheaton

I'm giving serious thought to making my own secondary. Grinding and figuring it using the 3 blank method.

I have heard that since it's for flats, that using plate glass is adequate.

I have also found out that people will sell just about anything on Craig's List including old glass coffee tables, some with 3/4 inch to 1 inch plate glass on them. I have no idea about the annealing on them, but for $50 for a huge amount of plate glass, I'm wondering if I should take the gamble? Maybe a small enough portion of the glass is ok?

How do you test that? I heard of using polarizers somehow.

What do you all think?

Of course after I make the blank, I have to core it at 45 degrees, using something in the 2.1 to 2.7 inch range. I went to Lowes today and found a hole saw that might work. But if I make my own, how would I do it?

Thanks for your ideas on that.

-Bill Wheaton
Decatur GA