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Posts Made By: jess tauber

August 4, 2008 07:16 PM Forum: Telescope Making

How flat are comparator mirrors?

Posted By jess tauber
Are comparator mirrors decent enough for large binoculars, or telescopes at high magnification, when used to redirect light into the objective? Thanks.

Jess Tauber

August 6, 2008 06:44 PM Forum: Telescope Making

NOW will we see curved CCDs for astrographs?

Posted By jess tauber
http://news.yahoo.com/s/nm/20080806/sc_nm/camera_eye_dc

Neat stuff. When do we get astro apps?

Jess Tauber

August 13, 2008 06:02 PM Forum: SCI-FI

Most terrifying creature or sapient?

Posted By jess tauber
The Blob

That thing on the derilict spaceship they discover after the moon is flung out on Space 1999 that spits you out charred before you even have a chance to say goodbye.

Multidimensional aliens (N-D's) from some British series I can't remember the name of who farm you for your brain chemicals.

TRIBBLES!

Jess Tauber


August 13, 2008 06:12 PM Forum: Telescope Making

Can you tell glass type by density?

Posted By jess tauber
Are mirror glass types sufficiently different density-wise to tell them apart when color can't? What ranges do they have if so?

Thanks,
Jess Tauber

August 15, 2008 12:40 AM Forum: Telescope Making

Which better- holing a flat, or making a flat from

Posted By jess tauber
Let's suppose for the sake of argument that I want to have a mirrored flat with a hole through its center wide enough to pass a returning light cone that was originally deflected off the 45 degree flat to a primary (isn't there something like this at Stellafane??).

Anyway, which is better- to try to core a hole through an existing flat (prior to mirroring), or coring the blank first before making it into a flat? Will the former method destroy the flat figure?

One more thing- I want the hole to be at a 45 degree angle through the flat, so that the light cone goes right through with no unusable area on the flat.

Jess Tauber

August 16, 2008 07:40 PM Forum: Religion

(The) shades of Ananias and Sapphira

Posted By jess tauber
After I read this story, about Islamic teachers in Senegal (http://news.yahoo.com/s/ap/begging_for_islam) I was reminded of the story about God striking down Ananias and Sapphira for keeping back part of the price of the land they were supposed to sell to support their little group.

Nice spin, eh? I guess nobody bothered to investigate to see if human hands killed them.
The apostles sure had a nice gig going for them- a few words here, a threat or two or three, and got well fed, probably nicely clothed, and so on.

A lot better than having to continue earning a living by the sweat of one's brow. All right, I'll offer that there was always the specter of persecution and death against them too, but if one kept moving (as the apostles often did) that was less likely a fate for them than it was for their converts.


Jess Tauber

August 17, 2008 08:04 PM Forum: Telescope Making

Nasmyth secondary support?

Posted By jess tauber
In a Nasmyth dob configuration with a large focal ratio (thus a smaller secondary), can one make a sort of 'fishing pole' support? That is, since there is no need of mounting for focuser or ep support, or rotating cage, etc., why not just have minimal support for a smallish secondary? If the pole is stiff enough, adjustments could be made near the mirror box.

The scope would end up (except for shrouds) looking like a sort of angler fish (the primary is the mouth). Has anyone done anything like this?

Jess Tauber

August 18, 2008 10:11 PM Forum: Religion

Who's brain dead?

Posted By jess tauber
Thank God for little miracles- too bad there aren't too many big ones.

http://news.yahoo.com/s/ap/20080818/ap_on_he_me/med_god_vs_doctors

Jess Tauber

August 18, 2008 10:20 PM Forum: Religion

That's the Spirit

Posted By jess tauber
http://news.yahoo.com/s/livescience/20080818/sc_livescience/monstersghostsandgodswhywebelieve

Forget about trying to sway each other- its all fixed. Now I'm going to go out to say hello to my friend the God of Winds and Storms.

Jess Tauber

August 19, 2008 10:42 PM Forum: SCI-FI

Most unusual Sci-Fi storyline?

Posted By jess tauber
I'll let you folks chime in before I throw in my 1.25 cents.

Jess Tauber

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