 the first observation of ammonia clouds in another planet 's atmosphere — the atmosphere creates ammonia ice particles from material coming up from lower depths ; 
 the first observation of ammonia clouds in another planet <a href='null_genetive' title='1'><mark>'s</mark></a>atmosphere — the atmosphere <a href='uninflect' title='2'><mark>creates</mark></a> ammonia ice particles from material coming up from lower depths ; 
The first observation of ammonia clouds in another planet  atmosphere — the atmosphere create ammonia ice particles from material coming up from lower depths ;