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Government Information on the Great American Eclipse: Introduction

This guide provides links to Government Information about the Great American Eclipse that will occur on August 21, 2017

USPS Total Solar Eclipse Stamp

The images above show the Forever stamp that will be issued in honor of the eclipse by the U.S. Postal Service. The USPS will issue a first-of-its-kind heat-sensitive stamp that changes when touched. The first day of issue will be June 20, 2017 (the day of the summer solstice). Stamps can also be pre-ordered in early June from Images courtesy of the U.S. Postal Service.

View a video of the eclipse stamps changing from dark (eclipsed sun) to light (full moon).

Solar Eclipse Magnitude (Definition)

The fraction of the apparent diameter of the sun covered by the moon. By convention it is usually quoted at maximum phase.

Source: NASA Eclipse Glossary

Total Solar Eclipse, August 21, 2017

This guide provides information about the Total Solar Eclipse that will occur on August 21, 2017. The path of totality will start in Salem, Oregon and end in Charleston, South Carolina. Macomb will see a partial solar eclipse (95% totality). This guide includes sites that provide scientific and other information about the eclipse, including some that provide links to vendors that sell glasses and other equipment that can be used to safely view and photograph the eclipse. Information about the special solar eclipse stamp that will be issued by the U.S. Postal Service is available beneath the images of the stamp to the left. If you wish to suggest another site that might be of interest, please contact me.

Eclipse Details in Hot Springs, Arkansas

Date: August 21, 2017
Eclipse Begins 11:46 AM
Maximum Eclipse 1:16 PM
Eclipse Ends 2:45 PM
Duration: 2 hours & 59 minutes
Obscuration: 89%

Linda Zellmer

Our thanks to Linda Zellmer, Government Information & Data Services Librarian at Western Illinois University.  She researched and compiled this libguide to inform and enhance everyone's experience with the Great American Eclipse on August 21, 2017.  We greatly appreciate her permission to allow us to share all of her hard work with you.

Solar Eclipse Obscuration (Definition)

The fraction of the sun’s area covered by the moon.

Source: NASA Eclipse Glossary

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