BenTheMan
04-14-07, 10:34 PM
http://www.taipeitimes.com/News/world/archives/2007/04/14/2003356607
Cool stuff...
Cool stuff...
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View Full Version : Water other planets BenTheMan 04-14-07, 10:34 PM http://www.taipeitimes.com/News/world/archives/2007/04/14/2003356607 Cool stuff... eburacum45 04-18-07, 01:46 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, 01:50 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) orcot 04-19-07, 01:38 AM 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, 11:07 AM 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. orcot 04-19-07, 11:16 AM 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 |