'Total eclipse of the heart'

The song was just on yesterday, but I don't get it: One of the defining characteristics of a total eclipse is that it's no more than about 7.5 minutes long. Well, yes, then you can get a partial eclipse … for about two whole hours. Whoop-de-do. If only all my heartbreaks had been seven minutes each. Just quit whining, lady.

UPDATE: How could I have missed this?

Thanks to commenter Sarcastro, of course.