The first eclipse map in the American Ephemeris

Eclipse map showing the extent of the partial solar eclipse over northeast North America and much of Asia. 

As this website is inaugurated, it's appropriate to recall the launch of the American Ephemeris and Nautical Almanac in 1855. Ephemerides had been published since antiquity with predictions for the motions of heavenly bodies and solar eclipses were always prominently documented, usually with maps.

With this map, the United States Naval Observatory (USNO) began publishing eclipse maps of each eclipse that occurred for the year of publication. This publication of eclipse maps continues to this day in the Astronomical Almanac jointly published by the USNO and Her Majesty's Nautical Almanac Office (of the United Kingdom).

One of the key missions of is to continue this eclipse mapmaking heritage with the publication of detailed and informative maps of the 2017 total solar eclipse for the public. Eclipse maps are special due to their ephemeral nature; they are good for only one area at one specific moment in time! An eclipse map invites you to see the breathtaking sight of a total eclipse of the Sun.

You'll find this and many more historic and contemporary eclipse maps at the sister website of,