Question to astronomers

General physics and astronomy discussions not directly related to Celestia
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Juan Marino
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Question to astronomers

Post #1by Juan Marino » 27.05.2006, 15:12

:idea: How is the possible appearance of HD 69830 d?

??C??mo es la posible apariencia del planeta HD 69830 d?

Dollan
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Post #2by Dollan » 27.05.2006, 15:18

I'm sure there are several possibilities. Considering its mass and its placement, I would guess that it might actually appear like Neptune or Uranus, a world covered by a thick atmsophere, and possibly a blue "haze" due to the scattering of light. I could easily see water clouds scutting across the surface as well.

One difference might be that the clouds are more obviously banded, so perhaps we have a Jupiter-like pattern with Neptunian coloration? Really, I think the book is pretty much open, though, on how the planet looks. For all we know, and despite its position in the star's HZ, this thing could look completely different and have an atmospheric composition leading to a completely different coloration.

...John...
"To make an apple pie from scratch, you must first create the universe..."
--Carl Sagan

Malenfant
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Post #3by Malenfant » 27.05.2006, 15:55

http://en.wikipedia.org/wiki/HD_69830

This has a few interesting artist impressions of the system (including the very bright zodiacal dust).
My Celestia page: Spica system, planetary magnitudes script, updated demo.cel, Quad system


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