Posts by Evil Dr Ganymede

by Evil Dr Ganymede
14.06.2005, 19:13
Forum: Celestia Users
Topic: Features request
Replies: 15
Views: 6651

Re: Features request

...I think that splitting Nebulae from Galaxies has been mentioned before, but nothing's come of it yet. Incorrect...or uninformed (no adrenaline involved here ;-) ) No, I was quite correct. By "nothing's come of it yet" I meant that it hadn't shown up in any official prereleases of Celestia. When ...
by Evil Dr Ganymede
14.06.2005, 08:52
Forum: Celestia Users
Topic: Features request
Replies: 15
Views: 6651

Re: Features request

Here are some more useful comments than Fridger's, who always gets hot under the collar the moment anyone even mentions thinking that Celestia is any kind of 'game'... To do that, how about a marker of direction, so you know where is the target. For example, you fly near Earth, you type ENTER and MO...
by Evil Dr Ganymede
14.06.2005, 01:05
Forum: Physics and Astronomy
Topic: HD 28185 b with earth-like moon?
Replies: 9
Views: 3977

Re: HD 28185 b with earth-like moon?

The key of course is how much radiation is B generating. Just because it is 5 times Jupiter?€™s mass doesn't mean it is putting out five times the radiation. Because of its make-up it may actually put out less radiation than Jupiter. Being that it is believed that B has a great deal more water in i...
by Evil Dr Ganymede
14.06.2005, 00:58
Forum: Physics and Astronomy
Topic: 6-8 Earth mass planet at Gliese 876
Replies: 11
Views: 3978

Re: 6-8 Earth mass planet at Gliese 876

I'm skeptical of the idea that it's a rocky planet. I mean, it's about 7 earth masses, orbits about 0.02 AU from its primary for a blackbody temperature of about 385K (albedo and greenhouse affect would modify this). And of course it'd be tidelocked. If it was rocky like Earth and had earth's densit...
by Evil Dr Ganymede
13.06.2005, 07:50
Forum: Physics and Astronomy
Topic: Mission New Horizons?
Replies: 8
Views: 3138

Re: Mission New Horizons?

I sure hope it gets presidential approval. I'd hate to have to hate bush even more, you know.... ;) :D It doesn't already? I thought it had got beyond the planning stages and was being built... If not... well, it's likely screwed. With Bush's damnable insane and badly planned push for manned missio...
by Evil Dr Ganymede
13.06.2005, 04:50
Forum: Physics and Astronomy
Topic: Speed of rotation of planets
Replies: 10
Views: 3035

Re: Speed of rotation of planets

Extending science fiction beyond what we take to be a standard of science....it could be possible for a planet such as mesklin depending on its material composition. Relying on known physics however...no it probably would tear itself apart...but then our knowledge is limited to a small portion of t...
by Evil Dr Ganymede
12.06.2005, 06:29
Forum: Physics and Astronomy
Topic: Mission New Horizons?
Replies: 8
Views: 3138

Re: Mission New Horizons?

You mean the Pluto/Kuiper mission?

http://pluto.jhuapl.edu/

Oh yeah. Definitely looking forward to that.
by Evil Dr Ganymede
12.06.2005, 06:27
Forum: Physics and Astronomy
Topic: Speed of rotation of planets
Replies: 10
Views: 3035

Re: Speed of rotation of planets

Mesklin is very much a scifi world (it's from a Hal Clement book called "A Mission of Gravity" I think). Can't exist in reality, it'd fly apart spinning so fast!
by Evil Dr Ganymede
09.06.2005, 19:58
Forum: Physics and Astronomy
Topic: I guess the Evil Doctor was right...
Replies: 2
Views: 1210

Re: I guess the Evil Doctor was right...

Mwahahahaaaaa!!!! :)

I can even do the "The Fools! They didn't listen to me! But now I've showed them!!!" tirade ;)
by Evil Dr Ganymede
08.06.2005, 04:23
Forum: Add-on development
Topic: Test Pics - Asteroid belt of HD 69830
Replies: 17
Views: 9196

Re: Test Pics - Asteroid belt of HD 69830

Damn. That is a ridiculously cunning way to get the hazy disk effect there. Great stuff!!
by Evil Dr Ganymede
07.06.2005, 20:41
Forum: Celestia Users
Topic: Screenshot Contest for Motherlode Backdrop
Replies: 28
Views: 7198

Re: Screenshot Contest for Motherlode Backdrop

Sure ;-) . That's why I called it Hexa world: six sides make a cube ...Never heard of it? ;-) "Cube" sounded much too profane for this 6-sided piece of art... Bye Fridger OK, we're on different wavelengths as usual :). I thought you were calling it a hexagon because it looked like one if you follow...
by Evil Dr Ganymede
07.06.2005, 09:06
Forum: Celestia Users
Topic: Screenshot Contest for Motherlode Backdrop
Replies: 28
Views: 7198

Re: Screenshot Contest for Motherlode Backdrop

t00fri wrote:But your "Hexa-world" is cute, indeed.


Erm, don't you recognise a cube when you see one? ;)
by Evil Dr Ganymede
07.06.2005, 06:49
Forum: Celestia Users
Topic: fulldome projection
Replies: 16
Views: 4908

Re: fulldome projection

What, you're actually managing to use Celestia in a dome? Like a planetarium? I thought you needed one of those Zeiss Projector things for that...

(and er, waves up-island at Terry :))
by Evil Dr Ganymede
06.06.2005, 23:37
Forum: Physics and Astronomy
Topic: Speed of rotation of planets
Replies: 10
Views: 3035

Re: Speed of rotation of planets

TourqeGlare wrote:This is interesting!

Is it true that the slower a rotating planet goes, the lower the gravity is?


No. The less massive a planet is, the lower its gravity is. You'd have to be rotating ridiculously fast to get a pseudo-gravitational force pulling you to the ground because of the rotation alone.
by Evil Dr Ganymede
05.06.2005, 05:20
Forum: Physics and Astronomy
Topic: Messenger peeks at Earth
Replies: 0
Views: 958

Messenger peeks at Earth

http://messenger.jhuapl.edu/news_room/p ... 31_05.html

Image

I like it when spacecraft take pictures like this :)
by Evil Dr Ganymede
03.06.2005, 03:00
Forum: Celestia Users
Topic: New version of Celesia
Replies: 4
Views: 1874

Re: New version of Celesia

... And Does a software making it possible to calculate the laws of kepler for a moon around a gas giant exist ? Celestia does it perfectly! Put your gas giant and its moon in orbit, by specifying the orbit data in an *.ssc file. Then Celestia does the rest, including a great display! Bye Fridger I...
by Evil Dr Ganymede
02.06.2005, 23:33
Forum: Physics and Astronomy
Topic: Earth with rings:How would it effect humans and animals?
Replies: 21
Views: 5448

Re: Earth with rings:How would it effect humans and animals?

Wow, those rings would really piss off astronomers on Earth, wouldn't they! :) The light they'd reflect would be quite bright (though it'd be unlikely that they'd be made of Ice like Saturn's. Still, even if they were low albedo like Uranus' rings, they'd still look quite bright from Earth wouldn't ...
by Evil Dr Ganymede
29.05.2005, 20:10
Forum: Physics and Astronomy
Topic: how to calculate magnitudes?
Replies: 35
Views: 10170

Re: how to calculate magnitudes?

Question about Planet magnitudes: referring to http://www.answers.com/topic/absolute-magnitude In this case, the absolute magnitude is defined as the apparent magnitude that the object would have if it were one astronomical unit (au) from both the Sun and the Earth and at a phase angle of zero degre...
by Evil Dr Ganymede
28.05.2005, 17:38
Forum: Physics and Astronomy
Topic: how to calculate magnitudes?
Replies: 35
Views: 10170

Re: how to calculate magnitudes?

Thanks everyone, I've now got about 5 or 6 different equations that all mean the same thing and give the same results :). I've also found that m = 6 is about the limit that can be detected by the naked eye on a good night, m = -4 is about the minimum you need to cast shadows with... Does anyone have...
by Evil Dr Ganymede
28.05.2005, 02:49
Forum: Physics and Astronomy
Topic: how to calculate magnitudes?
Replies: 35
Views: 10170

Re: how to calculate magnitudes?

Hm. Maybe I put a number in wrong then... that's interesting though, because you don't have any (star) terms in there at all other than the luminosity. You could simplify it even further by replacing (d_sol/32.616) with a number (4.858e-7), and (m_sol) with a number too (-26.74). But yes, that defin...

Go to advanced search