Is this lens suitable for astro photography or even likely to be any good? It is being sold on ebay and is a Sigma F4 500mm mirror lens with T...

Hi Folks I know I have left this post a little late, but better late than too late :) The next Trefach star camp is on the 9th-11th of March. Brochures...

From Mathaba News Network: http://www.mathaba.net/0_index.shtml?x=549756 When Neil Armstrong and the astronauts that followed after him were on their way to...

A number of authors have calculated the exact position of the Third Lagrange Point (the one more-or-less at the anti-Moon position); a somewhat larger number...

"Three new types of object have been discovered in our galaxy: huge gamma-ray clouds, dense X-ray engines almost hidden in cocoons of dust, and bubbles blown...

Hi all, a picture of the Moon, taken on the 25th of last month. Toucam pro with IR-cut filter at the prime focus of a C8, mosaïc of 45 frames. Too much...

I didn't catch all of it but The Sky at Night this evening showed pictures of Mars rovers as seen by an orbiter and mentioned they have cameras able to resolve...

When the kooks like Oriel and MI5 and too many to mention, outnumber the "good guys" ,,, the readable and informative guys (you know who you are !),,, is it...

I've just sold my TAL-1, in preparation for moving house. But I'd like to replace it with something a bit more compact, but which still doesn't break the...

As was pointed out on Friday at our society meeting in Milton Keynes, there are goings-on in the Southwest at twilight and just before dark. Venus, Mercury and...

That amazing little satellite of Jupiter has always contributed a wealth of information to heliocentric astronomy,the last being the astronomical adjustment...

I'm fiddling with an MCU replacement for my HEQ5, which among other things adds GOTO capabilities. When executing a GOTO, it currently runs each of the motors...

It is rare that an error can be condensed into a single sentence yet Flamsteed's false 'proof' for constant axial rotation can be so presented - "... our...

Hi I have a Helios 8" on an EQ5 mount with dual motor drive. Unfortunately the motor controller has given up the ghost. Long term I might invest in a more...

Does the earth appear to stay in the same place in the sky when you're on the moon, or does it wander about the sky, like the moon viewed from...

"The main camera for NASA's Hubble Space Telescope is out of commission again, but this time, the agency believes it can never be fully revived. Hubble's...

Poor seeing gave way slightly to allow me to grab a half decent red this morning. I guess I'll have to wait for the...

Hi everyone, I was just wondering if anyone with any experience of viewing magnitude 1 stars from the UK (with no light pollution and no moon) could have a...

http://www.colormoon.pt.to/ FoFP

I have started using a web cam initially for imaging the Moon using Registax software. Last night I obtained a really good video image of the crater Plato....