The arXiv, a freely accessible database hosted by Cornell University, is a collection of searchable technical material on physics, mathematics, computer science and other subjects. Included with the physics materials are journal articles, white papers and other technical reports in the field of astrophysics.

This site traces the history of eclipse maps in a series of galleries External, with images ranging from maps dating back to 1654 to the modern computer data driven maps of today.

As the site name suggests, this site deals with eclipse chasers, allowing users to enter and track the eclipses they have seen. However the site External has a great deal more content, from eclipse chaser terminology External to historical information on eclipse viewing from the air External and sea External to links to material from past solar eclipse conferences External.

Andrew Fraknoi created this guide for the Astronomical Society of the Pacific. It includes resources relating to eclipses in general and the 2017 eclipse in particular. While listing many of the same sites as other web guides, this guide includes more magazine article references than most. Links to the articles are not included. However, the Library has Astronomy and Sky and Telescope in print and electronically for on-site users. While the original link to this guide no longer functions, the Internet ArchiveExternal has preserved the Society webpage and guide. The Library of Congress too, has preserved the Astronomical Society of the Pacific webpage, and guide, among our Web Archives.

NASA’s main website has a page with a short overview of eclipses, images and videos.

The IAU External, an international organization of professional astronomers and national astronomical societies, maintains a working group to promote eclipse science to the general public and assist in coordinating expeditions. Their site includes links to information on past and future eclipses as well as reference material.

Eclipses can affect the generation of electrical power! Even in areas not crossed by the path of totality, where the solar eclipses are only partial, they have a noticeable effect on electrical power generation. California Independent System Operator, a California power supplier, produced this page with information on their plans for operation during the 2017 eclipse and a report discussing the actual effect of the 2017 eclipse on the system.

Fred Espenak, NASA’s now retired eclipse expert, shares some of his images from years of eclipse viewing and advice on eclipse photography at Mr.Eclipse.com. The site also has information on related topics such as eclipse quotations and specially issued stamps. Espenak also maintains EclipseWise.com External, a personal eclipse prediction site and other astronomy sites.

Tables and maps of eclipse paths calculated by NASA astronomer Fred Espenak make up much of the material available at this site, covering solar eclipses from 1900 BC to 3000 AD. This data was published in Five Millennium Catalog of Solar Eclipses: -1999 to +3000 External. Predictions from 1986 to 2035 are also reproduced in the book Fifty year canon of solar eclipses, 1986-2035. The site also includes NASA’s solar eclipse bulletins External, as well as a listing of “Solar Eclipses of Historical Interest External,” and links External to additional sites.

The American Astronomical Society maintains a page on eclipses and eclipse viewing. The site has a prominent section on eye safety and links to a variety of resources including books, educational materials, images, maps and more.

Eclipse chaser Xavier Jubier created this site, which allows one to enter a location and an eclipse date, and see what the specific times for and appearance of a solar eclipse. The tool includes a map that users can click on to specify a location. Jubier’s solar eclipse website External also includes images and maps from numerous eclipse expeditions and upcoming eclipses.

A short article based on information provided by the American Astronomical Society, this piece, on the American Academy of Ophthalmology website, presents tips on safely viewing eclipses.

This site, though created specifically for the 2017 eclipse, includes a variety of information on eclipses in general as well as images, videos, apps and other material available for viewing and downloading. An education page includes links to activities for students of all ages and a citizen science page lists several scientific projects that took place during the eclipse, as well as some that are going. Other resources on the page include links to relevant information from other agencies and even a page on eclipses and music External.

The United States Naval Observatory maintains the Master Clock of the United States, and collects and distributes astronomical and timing data for navigation and communications. In the past, in furtherance of that mission, the Observatory dispatched expeditions around the world to observe eclipses and other astronomic phenomena. The Observatory's Library & Archives has made scans of some of the materials from these expeditions, as well as images of daily life and work at the observatory, and blueprints of observatory equipment available through the Internet Archive.

The United States Naval Observatory’s U.S. Nautical Almanac Office and Her Majesty's Nautical Almanac Office of the United Kingdom jointly produce an Astronomical Almanac and make available an online version of the Astronomical Almanac External. The data from the almanac is used to create maps and simple animations that show what an eclipse should look like from different major cities. Eclipses from the year 1501 to the year 2100 are included. The USNO Eclipse portal itself can is searched by year, but a list of locations External, suitable for browsing, is also available. Each of the included locations has a list of eclipses visible from that site and clicking on one of the eclipses will display an animation of that eclipse.