While it is uncertain what the song is really about (like other Bowie songs), the lyrics make oblique reference to life in post-9/11 New York City. However the video clip, directed by Brumby Boylston of National Television, tells a surreal story using lenticular-postcard-like images of a spaceship almost crashing into the modern American heartland. Bowie himself said of the song: "I’m not a political commentator, but I think there are times when I’m stretched to at least implicate what’s happening politically in the songs that I’m writing. And there was some nod, in a very abstract way, toward the wrongs that are being made at the moment with the Middle Eastern situation. I think that song is a pretty good manifesto for the whole record."

The song title is a play on the words 'nuclear star'.

The b-side is a cover of Sigue Sigue Sputnik's "Love Missile F1-11"

The music video features lenticular images throughout.

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Wikipedia