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S U M M E R 2 0 1 7 U o f L M A G A Z I N E | 2 9 Path of totality Path of partial eclispe Source: 200 miles MOON Moon's orbit Hopkinsville Louisville Penumbra (partial eclipse) Anatomy of a Solar Eclipse Phases of the eclipse The path Umbra (total eclipse) SUN EARTH FIRST CONTACT Edge of the moon starts to overlap the edge of the sun. The eclipse begins. CAUTION! The ONLY safe time to look at an eclipse with the naked eye is during the TOTAL phase of a TOTAL eclipse. And even then, you must ALWAYS use eye protection any time any piece of the sun's bright disk is visible. It is NEVER safe to look at the partial phases of an eclipse without proper protection. SECOND CONTACT The moon covers the entire disc of the sun. Total eclipse begins. TOTALITY Max phase of a total solar eclipse. The sun is completely covered. THIRD CONTACT The moon starts moving away. Parts of the sun's disc reappears. FOURTH CONTACT The moon stops covering the sun. The eclipse ends. The Aug. 21 event will be the first total solar eclipse visible from the contiguous U.S. since 1979. Its path crosses from the Pacific to Atlantic coasts. Hopkinsville, Kentucky is the center of the phenomenon, where the eclipse will be visible for a full 2 minutes and 40 seconds.

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