THE growing importance of astronomical observation in air navigation, as a result of the increasing range of aircraft, is reflected by the recent publication of an “Air Almanac”, specially ...

With subzero temperatures and snow showers under our belts this winter, many Wisconsinites are probably wondering when the ...

While the almanac may not be the most accurate predictor of weather, the United States Naval Observatory, Astronomical Applications Department also expects this year’s autumnal equinox to occur ...