4th Entry, 1257 Hours: The overcast skies will disrupt the Celestial Tracking team's efforts for much of the day — the same potential source of frustration that navigators like Henry Hudson and Adriaen Block faced 400 years ago. In our case, however, it's all right; the team still has tomorrow to complete their data set. But if there's no visible sun in the sky, what's Evelyn looking at? Click to the next page to find out!