What can I image in the far Southern Sky in under 5 minutes? (3) The Globular Cluster - Omega Centauri Discovered by Edmond Halley in 1677 NGC 5139 is better...

Light pollution in Toronto makes stars below 3.5 mag invisible. But the comet is way beyond that. This is a 10 second exposure with a small 66mm apo on a...

Until Mustapha drys the fines consistently, Jbilou won't risk any unknown segments. Hussein, have a deep trade. You won't dip it. ****ing don't prove the...

For those who remember me, yes I'm still around. Haven't done this for awhile, but the September S&T article (p. 120) got my attention and I thought I'd give...

In another thread, Chris L Peterson writes: even perfect optics will make stars look larger than they would naked eye. That's simply a consequence of the...

I managed to get this one done tonight just before the rain and snow came in. Its a short and simple U-Tube video showing the opening of the slot and rotation...

Assistance to Law Enforcement Act") to force a massive reworking of the U.S. telephone infra- structure so that the government can...

Is there some accessory for the telescope in Subject that allows one to mount it to the head of a camera tripod? There's a rail along the bottom length of...

OK, cabling problems are now solved. I have it setting on a dolly in the garage. That prompted me to ask if there's a large dolly that has big wheels that...

Beginner question ... What are benefits and disadvantages of a Single Axis drive vs. a Dual Axis drive? Thanks. Bill Lugg

What do you call those four 'sparkling' lights that stretch out from light sources (like stars)? When I look at Mars or Venus using XT8, I see these four...

A brilliant crimson-red Class IV aurora is in progress as seen from southeastern NY. At 00:00UT fully 80% of the sky is covered with auroral light and there is...

For those in the US, England's Astronomer Royal Martin Rees will be on the Charlie Rose show on PBS tonight at 11:30 PM. Sorry but I don't have any additional...

I'm surprised to find there have been no comments (yet) on the folded Herschelian reflector as described on pages 132-135 of the March 2004 SKY &...

Do you think this could be a rain water run off channel? http://www.lyle.org/~markoff/processed/1P137328724EFF2121P2576L234567M1.JPG Opportunity, Sol 103,...

While scanning magazine covers at a local newsstand yesterday, my eyes came to rest on this featured cover story at the top of Discovery magazine: "How to...

I just started using the camera recently, and found it had a timer to turn off the power after x minutes. That surprised me a bit, since I suspected that if...

Had some thoughts and am looking for intelligent input. I read that thread about how much power is needed to "see" M31. I've been trying to develop our group...

A toy. http://www.bbc.co.uk/news/world-us-canada-14497641

When I add a filter to my eyepiece and put it back in the focuser, I have to change the focus a bit. Why does the focal length change? -- Bruce...