Illustration courtesy of NASA’s Goddard Space Flight Center
During the Aug. 21, 2017, solar eclipse, the moon will move between the sun and the earth, blocking light from the sun and casting a shadow over North America. The two parts of this shadow are the umbra and the penumbra. The darkest part is the cone-shaped umbra. Where the tip of the cone meets the earth, that’s the path of the total eclipse. The penumbra—the lighter part of the shadow—is where a partial eclipse is visible. The illustration shown here is not to scale.
Total blackout – Get ready for the once-in-a-lifetime total solar eclipse sweeping across South Carolina this summer on Aug. 21.
How to protect your eyes – Proper eye protection is critical for safely viewing partial and total solar eclipses. Use these tips to protect your vision.
By the numbers: The Great Solar Eclipse – A total solar eclipse is, for most people, a once-in-a-lifetime experience. Take a look at the numbers that make the 2017 eclipse special.
Eclipse tips – First time viewing an eclipse? Get some advice about how to make the most of it.
How long will I be in the dark? – Find out what time the eclipse starts in your community and how to position yourself for the longest viewing times.