Short answer is yes. I did the first mission on the moon, and made it to where the hive come pouring out of the giant door, and after farming for about an hour I was able to get am exotic off of a legendary engram. If you go there just make sure not to kill the big guy, and don't be afraid to die to reset the spawn of them pouring out the door. It's a blast to do for an hour or so and grind loot hardcore