There is one thing I agree with Lucius on, and that is that many people would [i]know[/i] of Azura's Star, along with other famous artifacts. There are several popular books, such as [i]Tamrielic Lore[/i] that tell of these legendary items. It's just that Daedric artifacts aren't something you just...get. In each of the games, you play as a fated hero of some type, so what you can do there doesn't apply to the majority of Tamriel's people. In order to get a Daedric artifact, you would have to be a faithful servant of the Daedra, or [i]really[/i] lucky to come across it, or the knowledge of where to find it. I wouldn't say it would make sense for us to get any artifacts like that, unless it was a major part of the story.