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The Andromeda Society

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Andromeda Society's monthly meeting & Star Gazing, Friday, January 19th 7:00 pm - 10:00 pm.

Did you get a telescope for Christmas and need some help?

Bring it to the meeting for some help.  There will be a presentation on how to align your scope with star gazing afterward. 

Don't have a scope?  Look through ours.

See you there!
At the YUCCA MESA Improvement Assn. COMMUNITY CENTER Located at 3133 Balsa Ave, Yucca Valley off Avalon & Aberdeen. 

Happy New Year

It's that time of year again,  Annual dues are upon us.  If you joined late in the year, after August 1st 2017 you are paid through December 31st 2018 .  

Memberships & Renewals.

Annual Membership $10.00 Student $20.00 individual 
$35.00 for immediate family members

Save with a Lifetime Membership, $300.00

We will be planning special events throughout the year, so be sure to check back.
If you are unsure of when you paid your dues you can ask us at 

Plus Miscellaneous other discounts throughout the year. 


You can now use your Credit Card to join or renew your membership dues to the Andromeda Society.  
Your membership dues supports our website, hospitality at club meetings also programs and other events like 
Starry Nights going Free of charge.  

Or you may join or renew by check 

Send Payment to:

P.O. Box 8
Yucca Valley, CA. 92286

Please include your name, address, phone, email info.


Telescopes and problems:

What I would like to cover next the problems and fixes for those who have a Newtonian telescope.  The biggest draw back to the Newtonian is the frequent misalignment of its optics.  The alignment of the optical train is very important to the visual use of this telescope.  With improperly aligned optics, your objects will be lopsided star images will look like small flares or fans. 

The main optical parts to align are the main mirror (primary objective) and the small diagonal mirror (secondary) needs to be properly collimated.

Your Newtonian reflector will give great images of stars and planets, as long as you keep it aligned.  The alignment of the telescopes optics is collimation. You may have heard that it is incomprehensible, tedious, time-consuming, a pain in the neck, and best avoided.  This in not entirely true, and one that will become easy to do.  Its better see a nice clean image than trying to focus an image and get very frustrated.

Know Your Newtonian Reflector Telescope

This diagram illustrates the Newtonian reflector's optical components and some of the structures that support them. Aligning and centering these components is necessary for optimal optical performance.
All illustrations are from Sky & Telescope.

If you aren't already acquainted with the optical parts of your telescope, now is the time. Here are the components that you will be lining up:

At the bottom of the tube, you have the primary mirror this mirror is usually a parabolic mirror (mirrors with a focal ration greater than 9 do not have to be parabolic).  This mirror will collect the light from the distant object and direct it to the eyepiece via a small secondary mirror.

To make collimation easy, the center of the mirror should be marked in some way. I recommend marking it with a Sharpie pen making large enough to just been seen. 

Don't make it too small — a 1/8-inch-diameter (or even slightly larger) spot works well. As long as it is smaller than your diagonal mirror, it will not affect your telescope's performance. Another approach is to use an adhesive binder reinforcement ring, the kind used by generations of school children to keep their homework from flying out of their 3-ring binders.  I don’t like this method because it leaves a residue on the mirror and it tends to come lose.

The primary mirror will be held in place inside an adjustable cell.  Designed support for the mirror without deforming it.  By adjusting the cell's three collimation screws we can fine-tune the mirror's tilt and accurately position the spot.

The Secondary Mirror
The secondary mirror serves to move the image formed by the primary to the side of the tube, where it is viewed through the eyepiece. The secondary, or diagonal, is generally an elliptical mirror only large enough to let the central portion of the focal plane light from the primary mirror. You should center this fully illuminated area in the eyepiece by positioning the secondary in the correct location.

The secondary being attached to an adjustable holder suspended on a spider often a cross or three vans and in some cases a single or curved vane made from thin sheet metal. The secondary holder has three adjustment screws. Along with this is also a central rod that allows the secondary to move back or forward.
The Eyepiece holder (Drawtube)

The third optical component in the telescope system is the eyepiece. It is a complex magnifying lens used to view the image formed at the focal plane. Like the primary mirror, the eyepiece has an optical axis, and this axis should be aimed at the center of the main mirror for best performance — though in practice it is the center axis of the focuser drawtube that you aim at the primary mirror.

A good eyepiece will render a sharp image in the central parts of the field of view, but toward the edge not even, the best and most expensive eyepieces can produce a perfect image. For this reason, it is important to make sure that the primary mirror and the eyepiece match up — the ultimate goal of collimation.

Enjoy the View!

Questions or comments, you can ask Manuel simply by sending him an email.

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Also during the year, Please Join us, as we team up with the Southern California Desert Video Astronomers  and
The Joshua Tree Astronomy Arts Theater for other  Star parties.

Go to www.scdva.org or www.jtaat.com
For dates and times of events

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You asked for it
Now you got it!
You Can Now Renew Your Tax Deductible Contributions on Line
Click the link below.
You can now use your Credit Card to make donations to the Andromeda Society.  

Your donations go towards keeping Free programs and other events like Starry Nights going.
Annual Membership $10.00 Student $20.00 individual        $35.00 for immediate family members
Join today and your membership will be good through 2018
Remember your membership dues is tax deductable.

Save with a Lifetime membership $300.00


*Contributions are Tax Deductible 

 Or if you prefer, you can mail your check to
Andromeda Society
P.O. Box 8
Yucca Valley, Ca. 92286

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Contact information
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Updated January 18, 2018