Search found 82 matches

by Lady Isabella
Sun Nov 23, 2008 1:04 pm
Forum: General chat
Topic: Einstein And Eddington
Replies: 23
Views: 5622

I did enjoy it, but like what Stella says there were some errors and one very glaring mistake regarding the personal life of Einstein.
by Lady Isabella
Fri Nov 14, 2008 7:56 pm
Forum: General chat
Topic: Scopes for schools?
Replies: 86
Views: 21584

Hi Cliff Even at 3.3 degrees I think that in-experienced eyes will struggle with the rings with the supplied scopes. I think that most people viewing Saturn for the first time will be very disappointed with the view on show during 2009. I know from experience with my public viewing events, that peop...
by Lady Isabella
Fri Nov 14, 2008 6:10 pm
Forum: General chat
Topic: Viewing objects with a Dobsonian 200mm.
Replies: 36
Views: 9316

What is the size of the aperture stop on the 200mm scope?
by Lady Isabella
Fri Nov 14, 2008 6:04 pm
Forum: General chat
Topic: Scopes for schools?
Replies: 86
Views: 21584

I think that the rings of Saturn wil be edge on in 2009.
by Lady Isabella
Tue Nov 11, 2008 10:39 am
Forum: General chat
Topic: Near Earth asteroid
Replies: 11
Views: 2108

Hi Paul I would think that the Earths atmosphere would encounter these smaller sized objects on quite a regular basis, then we also have incoming man-made space junk. The thing is that most of these burn up in the atmosphere. I was thinking more of the ones that make it through and can cause damage ...
by Lady Isabella
Sat Nov 08, 2008 10:35 pm
Forum: General chat
Topic: Near Earth asteroid
Replies: 11
Views: 2108

I seem to remember reading that we can expect to get hit several times each century. Over the course of a century we can expect one event on the scale of Tunguska, with around five smaller hits. Doing some digging, I see that the Earth was hit by a 10 Hiroshima bomb size event in 1863. In 1908 we ha...
by Lady Isabella
Sat Nov 08, 2008 9:46 pm
Forum: Gallery
Topic: Sun and Double Cluster - Cliff Meredith
Replies: 15
Views: 3357

I like to think I am fairly stringent\conservative assessing magnitudes (whilst I understand that magnitudes fainter than about mag +11 given in SkyMap Pro and probably most other planetarium programmes are a bit suspect anyway). Hi Cliff Yes, that is correct. According to Brian Skiff, the Hubble G...
by Lady Isabella
Sat Nov 08, 2008 11:51 am
Forum: Gallery
Topic: Sun and Double Cluster - Cliff Meredith
Replies: 15
Views: 3357

A print out of the Double Cluster pic seems to show stars down to about mag +11 to 11.5, but viewing my processed image on the PC monitor I reckon to see down to about mag+12.5. Hi Cliff Last night while using a 80mm f/7 APO and Canon DSLR, I recorded stars down to magnitude 13.0/13.1 in the Double...
by Lady Isabella
Thu Oct 23, 2008 9:31 pm
Forum: Telescopes and instruments
Topic: Eyepieces, the good the bad and the ugly
Replies: 3
Views: 1886

As your scope is f/13.88, I would think that any half-decent Plossl eyepiece will give very good views. BTW, I have those two eyepieces, and I really like the 25mm model. If it were me, I would not waste money on any really expensive eyepieces for use with a Mak scope.
by Lady Isabella
Thu Oct 23, 2008 6:13 pm
Forum: Observing
Topic: Finally found Neptune
Replies: 7
Views: 2558

So I tried to find Vesta last evening late. I let an LV 4 eyepiece in the tube, giving 300x magnification. Yes, it still was difficult to focus, absolutely not visible as a disk. But Vesta appeared as a very solid orange star, drifting smoothly in the eyepiece, no struggling focus, same constant or...
by Lady Isabella
Sat Oct 11, 2008 7:27 pm
Forum: General chat
Topic: Scopes for schools?
Replies: 86
Views: 21584

Yes, indeed, the SPA is hoping to provide telescopes to 1000 schools in the UK. We are just waiting for the final stages of the funding to be sorted out and then we will be making a full announcement. Guy Fennimore (SPA Secretary) Hi Guy This seems like a good way for the SPA to get plenty of publi...
by Lady Isabella
Sun Oct 05, 2008 11:28 am
Forum: Absolute beginners
Topic: Bresser Messier R152S pros and cons ???
Replies: 3
Views: 2934

Hi Dave and welcome.

What are you wanting to do with the scope? Being an f/5 Achromat,I would think that it would show a fair bit of Chromatic aberration in the image.

I use an f/8 Achromat and find the C.A. for visual use is quite well controlled but still visible in images.
by Lady Isabella
Sun Oct 05, 2008 11:16 am
Forum: Telescopes and instruments
Topic: Just taken the plunge
Replies: 30
Views: 7713

Hi Dave

Image sent.

Regards.
Lady I.
by Lady Isabella
Sat Oct 04, 2008 7:46 pm
Forum: Telescopes and instruments
Topic: Just taken the plunge
Replies: 30
Views: 7713

Hi Davej

An extremely nice cover for a LX200 is in the latest edition of the BAA journal. It's a dummy dovecote, looks very nice and hides the scopes.
I can email some pictures if you think it will be of interest.
by Lady Isabella
Thu Oct 02, 2008 3:05 pm
Forum: Observing
Topic: How to spot Uranus
Replies: 9
Views: 3048

Hi

The changing brightness was due to various ices in the upper atmosphere of the planet. If I remember correctly, the biggest change was half a magnitude, making the planet easier to see with the naked eye.