Greetings. I saw the thread about CG5 mounts and the link to the french site that compared various mounts. I am wondering how one measures periodic error, as...

Hello all and thanks for the suggestions. Last night's weather was really nice. Still, tons of ambient light from 1) the sunset 2) Manhattan We saw some nice...

Funny thing is that his latest msg is dated 24 hrs in the future. If he cannot tell what day it is, how reliable can his count ever be?

I just got the #64 adapter for my Meade ETX-90 (Non Goto early version) and attached my Fuji S1 digital camera to the scope. My problem is this: VIBRATION....

From the Italian skies this photo of the...

I killfiled Dr. Min a long time ago -- perhaps I should not have done that? It appears from several items posted here that he has made a prediction (prophecy...

Hey y'all, I am considering the purchase of my first quality barlow and would like to better understand my options. Because most of my eyepieces are 1.25"...

I had a pair of 10x50 Pentax WP PCF (waterproof). They are now gone (stolen, along with all my other optics)), so I figured a need to buy a new pair. I think...

Last night observing the moon from my house in Massachusetts, USA at around 01:00 UT 8/24/04, I noticed an interesting feature near the terminator of the moon....

Having followed recent threads concerning the cost of amateur astronomy, I wish to share a method of financing your needs for fun and profit. What, if...

Would it be possible to take a 15 second exposure with a CCD and some software that automatically stacks...with a Dob? My question obviously has to do with the...

I have been shopping for a good digital camera for astrophotography. I have found that in general CCD is the way to go over CMOS because CCD produces less...

"Vast. Captivating. Dynamic. Spectacular. Distant galaxies and nebulae changing and evolving moment by moment. Stars born with explosive force and energy. ...

I have a pretty good telescope and a pretty good location for observing, considering it's close to San Francisco. Earlier this week, we had some warm...

I know you said you want to do photography, but unfortunately I dont think that C6N will ever do it successfully. At least nothing more than you couldnt do...

They are up at 5:00 am local Daylight time. Get up early and take a look. It must be winter coming. The skys were very hazy but seeing was very steady here...

Ok, assume you want to get into the field of capturing after glows of gamma ray bursts, or supernova hunting. what would be the typical magnitude you can...

Can anyone answer that question? I have tried opening the Registax 32 bit FIT files in many other programs, but all I get is either total darkness or a small...

I will be visiting Jena, Germany, 12-17 September, from my home in Oregon. Days will be mostly busy, but evenings will be free. If there are any amateur...

Hi everyone, I need some advice on a pair of binoculars that are handy enough to carry, but also good low-light performers. I understand that the lower...