The NASA Eclipse Web Site contains multiple pages of data which students can explore, analyze and use to explain phenomena. The site contains data on solar and lunar eclipses and on the transits of Venus and Mars. On the solar eclipse page, students can access dates and details for 5,000 years of eclipses. Links are available to Google Maps and the World Atlas of Eclipses. In addition, there is a JavaScript Solar Eclipse Explorer which calculates local data for dozens of cities for several millennia. Of special interest is an entire page, along with an interactive map, dedicated to the Total Solar Eclipse of 2017. The lunar eclipse page provides similar information on 5,000 years of lunar eclipses, a Javascript Lunar Eclipse Explorer and Special Interest articles specifically on lunar eclipses. The web site is designed to provide data and information; teachers will need to create lessons that utilize the resources found here.