Celestia Forums

Just thinking out loud. Though a monitor hasn't the same range as direct visual observation, in the case of the martian moons it seems to be working for the monitor rather than against it. So shouldn't it be possible to introduce a fudge factor to display the appearance as would be seen with the eye...

Thanks for the info guys. I keep forgeting the dynamic range of a monitor is nowhere near the capability of real life vision. Didn't realise the moons orbits were based on a simple model either. With the F ratio: I'm aware the larger focal length gives more magnification but from what I've been read...

G'Day to you too Don and everyone else here! Was interstate for the last few days and decided that it's about time I got a telescope while I was there. Got myself a cheap ($650 Aus) skywatcher 90mm mak-cas mainly for the portability, it's also dual purpose as I can use it as spotting scope when targ...

Thanks Ynjevi, Tempararily forgot the time scales involved. Even if the after effects can be seen for many years it's only a small percentage of the life cycle. Some of the descriptions I've read seem to imply they are visible from far greater distances than they probably are. Guess I'll take a more...

Reading through some other posts and links, it say's there are over 200billion stars in our galaxy. I read somewhere a long time ago that a certain percentage of stars larger than some given mass go supernova after a short (compared to our sun's) life time. Given the size of the known universe and t...

I don't have any scopes to experiment with, but I am now wondering how much color gain / saturation is gained for every minute of film exposure time? Aside from the dependency on the size of the scope. I don't have a scope either but as far as I'm aware, please correct me if I'm wrong here, each fi...

Thanks Selden I'll try it on my home machine with a GF4 card and see how it goes. For the record the TNT card at work has 32M of ram, I have a default celestia instalation apart from your add-on, no extra textures etc. I'll let you know how it goes on the other machine.
Thanks again.
Regards,

Hi Don, Whilst I agree that it would look great to have objects like that one of the aims was to see the universe as if from a port hole in a space craft. If you look carefully in the supplied links you will see that the images are formed using long exposure photography, so in effect they are color ...

Hi Selden, I downloaded the v3a.zip (26sep03) and installed it sucessfully, looks great too. Have one problem where the image does not display but is marked. If I move drag the display (using left click and drag) it sometimes appears and other times disappears. This only occurs with a few of the obj...

STRUMPET ALERT!!!
Bring on the purgatory...

Good call Paul, amusing link too.

Regards,

Hi ElPelado, Correct phrase is "lightning strike" but everyone knows what you mean:) Unfortunately lightning strikes on electronics tend to be pretty fatal even the surges generated from a strike many km's away do great damage. Visual inspection of the sensing element can to a trained eye determine ...

I read many times that you can make a CCD from a webcam, but my question is: can i make a CCD from any webcam?? Web cams come in basicaly two flavours, CMOS and CCD. The cheap ones are CMOS and the more expensive (sometimes only marginaly) are generally CCD. So, to answer your question, if the web ...

Fridger, W.R.T. the HST, I always thought it was that they applied the compensation twice. The specification already had the effects of gravity compensated and the manufacturer then applied it again. Just what I've always been told but hey it wouldn't be the first time I've got the wrong story. Some...

Here's possibly a dumb idea but I wouln't mind a few opinions on the problems I'd be facing if I attempted to try and build one. I've always wanted a teleccope, however: 1) A decent one is $$$$ 2) I wanted to look at different parts of the spectrum not just the visible. With current technology comes...

Covering up a blue sky on Mars?
Now I've heard everything.
To what end?
Is there another theory that they have started terra forming Mars because Earth is doomed?
arrggggggg......

Thank's for the reply guy's. The formula and Grant's excellent description has cleared things up. I must agree, it would make more sense to refer to the escape energy rather than velocity simply from a clarity point of view. Given the above formula it's interesting to note that an object could be "d...

It's been a while since I studied physics so I was wondering if anyone could clear up my understanding of escape velocity. I'm being told that the escape velocity is a the same for powered craft and non powered craft. This makes no sense to me. I'm also being told its a constant for any given planet...

Hi Fridger, You sound like one very happy customer! Now you have all this power in your hands I hope you don't forget the less fortunate of us who still have our steam powered cards!:) It would be a real pity to see some of your excellent works and know it won't run on lower end machines. Have fun a...

Hi Paddywak, I've had a similar issue going back a couple of months ago. In my case it turned out to be some incompatible files I had in the celestia directory. It happened because when my system went down I also upgraded to a newer version of celestia but had reminants of some older format files th...

Sorry I'm from Australia. My opinion at present is formed by the things I have personally seen over the last six or so years in the industry. Most noteably and recently a VERY UGLY building in the heart of Melbourne. I just scale the issues up and can't see any action happening except that behind th...