View Full Version : Water other planets
BenTheMan
04-14-07, 11:34 PM
http://www.taipeitimes.com/News/world/archives/2007/04/14/2003356607
Cool stuff...
eburacum45
04-18-07, 02:46 PM
Nothing particularly obscure about that planet; it even has a name- Osiris.
I've made an image of it using Celestia;
here it is
http://www.orionsarm.com/gallery/osiris.JPG
eburacum45
04-18-07, 02:50 PM
Some more images of Osiris by other people
http://www.tycho.dk/ezimagecatalogue/catalogue/variations/2452-250x250.jpg
http://tracedemoi.typepad.com/tracedemoi/images/tres1.jpg
Too blue, too close
http://www.astro.pef.zcu.cz/hvezdy/obr/extrasolar/priklad/osiristail640.jpg
That is a good one- right colour and everything)
right colour
I always tought that a planet that's so close to it's star would apear either really dark from underlying materials, or silverly shine like a mirror that reflects heat with perhaps some color at the poles from the solar wind.
eburacum45
04-19-07, 12:07 PM
Probably the best page on the colours of gas giants was written by Jim Whatmough, here
http://www.extrasolar.net/speculations.html
The hot jupiters are described at the bottom as class IV and V
At such high temperatures, alkali metals become vapor. The most common of these is sodium, which is gaseous above about 1150 K. Normally, sodium absorbs narrow ranges of yellow light. But, in the high pressure atmosphere of a Hot Jupiter, atoms of gaseous sodium constantly collide with hydrogen, causing the absorption ranges of the sodium to widen. This effect is so pronounced that significant amounts of sodium in a Hot Jupiter's atmosphere can darken the entire planet, causing it to look a dark grayish brown. Recently, the presence of sodium gas has been detected in the atmosphere of HD 209458, giving some confirmation to the idea that Hot Jupiters are indeed dark worlds. Such dark worlds are called Class IV and have extremely low albedos of about 0.03 around sun-like stars.
I have seen a published paper somewhere which basically says the same thing.
Here is another of my images made using Celestia, showing a very hot and swollen gas giant world known as Hat-P-1.
http://img187.imageshack.us/img187/7369/leviathan2vv2.jpg
Note how dark the surface is where it is not glowing.
Probably the best page on the colours of gas giants was written by Jim Whatmough, here
... to bad he died.
More then accurate his work was also pretty
http://www.extrasolar.net/behind_watergiant.jpg
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