In Marvel's Captain America film what did Steve Rogers' metal star represent?
It is pictured in his hand above. I didn't get to see the entire movie but it didn't look like a rank or something from his uniform. More like a police badge.
As far as I can tell, the movie never says exactly what the medal is. I think Valorum's comment is correct that it's a Silver Star. Whatever it was, it was not Steve's but his father's. Around the 7 minute mark Steve's mom gives the medal to Steve:
Mom: "I want you to promise me you'll never take this off."
Steve: "Dad's Medal."
The implication in the scene is the medal was awarded posthumously to Steve's father for actions on Guadalcanal.