Today – August 21, 2017 – a total eclipse of the sun happens in the continental United States for the first time since February 6, 1979. In other words, the moon’s dark shadow hasn’t hit anywhere in the contiguous US or Alaska for over 38 years. It’s been a mighty long time!
Although totality begins at sunrise over the Pacific Ocean and ends at sunset over the Atlantic Ocean a little over 3 hours later, this total solar eclipse is only visible on land from the United States. But at any single spot along the total eclipse path, the total eclipse of the sun lasts for a maximum of just over 2 minutes and 40 seconds.
Unless you’re quite practiced at using a telescope and have a proper filter, don’t even try watching the partial solar eclipse through the telescope. Your best bet is to locate an astronomy club or an observatory near you that might be hosting a public viewing of this natural spectacle. Find an astronomy club here.
You don’t need a telescope or an optical aid to view this eclipse, but you do need proper eye protection. Safely and inexpensively watch this partial eclipse with eclipse glasses, or make a simple pinhole projector to indirectly view the solar eclipse, as explained here. You can also turn the telescope or binoculars into a pinhole camera, to indirectly and safely view any solar eclipse.
As shown in the above photo above, trees serve as natural pinhole projectors, casting leaf shadows and images of the eclipse galore. When you see the scene for yourself, you may want to sing along with the Beatles:
Images of broken light which dance before me like a million eyes, they call me on and on across the universe.
We present some eclipse calculators, which will enable you to find out eclipse times in your sky. The US Naval Observatory and NASA give the eclipse times in Universal Time. You must convert Universal Time to your local clock time. Subtract 3 hours for ADT, 4 hours for EDT, 5 hours for CDT, 6 hours for MDT, 7 hours for PDT and 8 hours for AKDT.
Interactive Map via NASA (click on the map for eclipse times in Universal Time)
Eclipse computer via the US Naval Observatory gives eclipse times in Universal Time.
EclipseWise gives the eclipse times in Local standard time, so if you’re on daylight saving time, you must add one hour. Timeanddate.com gives the eclipse times in your local time, so no conversion is necessary.
Solar eclipse calculator via EclipseWise (in local standard time)
Eclipse calculator via TimeandDate (in local time)
Bruce McClure has served as lead writer for EarthSky's popular Tonight pages since 2004. He's a sundial aficionado, whose love for the heavens has taken him to Lake Titicaca in Bolivia and sailing in the North Atlantic, where he earned his celestial navigation certificate through the School of Ocean Sailing and Navigation. He also writes and hosts public astronomy programs and planetarium programs in and around his home in upstate New York.