So, What planet/moon is this ?

[brewer]

Salt water vapor????

Literally the same as fresh water vapor, except the water had salt dissolved in it before it became vapor.  

So then just water vapor which was kind of my point.

[Gawdzilla Sama]

Literally the same as fresh water vapor, except the water had salt dissolved in it before it became vapor.  

So then just water vapor which was kind of my point.

The significance is the source, bodies of salt water. There's a poo-poo load of that out there. And the area around Western Africa is significant because heated seawater helps form hurricanes. 

(Sorry if I triggered you, Texas and Florida.)

[vorlon13]

For me, the image inspires wonder what alien eyes might see if they look at earth . . .