I looked at pics of the Martian Polar Caps. What would snowflakes of CO2 look like? Well, I got my answer, and not. For, the recent slew of probes sent back data that strongly suggest that CO2 (and probably +H2O) forms a virga, or a very very fine dust of microscopic snowflakes (actually teenie pellets or graupel). A couple of daring folks even tried to predict what Martian snow would look like in conditions close to Martian atmosphere, pressure, etc.
http://www.exo.net/~pauld/Mars/4snowfla ... lakes.html
Guess what? It was virga/teenie-weenie graupel.
No snowflakes, though.
http://www.atoptics.co.uk/halo/owco2xt.htm
Thoughts? Suggestions? Ideas? Drawings?
And, for that matter, what would ammonia snowflakes look like? or methane snowflakes from Titan?
What would their crystalline structures produce?
Again,
Thoughts? Suggestions? Ideas? Drawings?