I was in a viewing session the other night with a couple of friends, testing out a small Maksutov. When we turned the telescope onto M42, the sight was most...

On Feb 3, 8:55 am, "Szczepan Bialek" wrote: Everywhere is wrote: "The moon's mass is 81.3 times smaller than Earth's". I have also read...

I've managed to patch together a basic magnitude model that lets you project the expected visual (V-band) magnitude for an extrasolar planet (exoplanet) having...

119 Tauri is a 4th magnitude star of deep red colour, a few degrees to the lower right of the Bull's lower horn (which is of course marked by the the star Zeta...

Does any one know where can I buy one of these for pinpoint accuracy in astrometric measurements? Ideally it will be a standard 1.25" size, easy fit on my...

I'm convinced I've seen them with my modest Tal-1 Newtonian at 54x magnification, but I read in Patrick Moore's 'Atlas of the Universe' that a 12-inch or...

If we integrated light from the entire stretch of the Milky Way band across the whole night sky (what can only be done with some calculated "guesswork" unless...

Anyone care to guess what this is likely to be about? Tuesday promises to be a pivotal day in Mars exploration as NASA announces "significant findings" from...

Now that Spirit is starting close up science investigations on Martian soil, I have a few thoughts on the geology aspects:- What was lacking for me in the...

I had originally recorded my discovery of this pair just after midnight on the night of 29th April 2011, noting they had not been catalogued in the WDS and are...

The most colour contrasted out of all the double stars in the sky, based on B-V colour index: http://www.astroscience.org/abdul-ahad/WZ_Cas.htm I hope you...

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MESELX:IT&item=290279895538 If anyone fancies a travel scope in a couple of flight cases?

Just wondering if it possible to fit a dovetail bar to the base of an ETX-90 OTA, and then attach it to a Celestron Nexstar goto mount? I can't see there...

Ok, looking like the first clear night we've had here in a while so a quick check on Starry Night told me that Jupiter's spot should be facing us this...

And it's bloody raining here :( -- Abo

Could the Earth become tidally locked with the Sun (hypothetically; say the Sun has increased in size to allow it), or would the presence of the Moon prevent...

FFS the first proper clear night in ages, and it seems the guy out the back has decided to install a security light. Which blazed all night. In fact, it is...

After a bit of rooting about I've finally taken the plunge and purchased a second hand TAL-1 110mm Newtonian. Not got it yet, I'm picking it up on Tuesday...

Bah My wife informed me yesterday that she'd gone into my local Lidl on the morning of the 17th to obtain said scope for me for a pressie, but they were...

I picked up my TAL 1 yesterday and I have to say the engineering is pretty 'agricultural', in a good way. It certainly seems built to last! Of course it was...