2017 Solar Eclipse

Poster stating "Experience the 2017 eclipse across America. August 21, 2017"
Experience the 2017 eclipse across America

NASA/GSFC

On August 21, the 2017 Solar Eclipse Across America will be visible across the continental United States.

Yellowstone National Park is located just north of totality, yet visitors will still be able to experience 96–99% of a total eclipse—a stunning mid-day darkness as the moon moves in front of the sun. However, the sun's corona will not be visible, as that is only visible where there is a total eclipse.

What is an eclipse?

A solar eclipse is a celestial event when the moon passes between the sun and earth—blocking all or part of the sun. At a given location, the event can last up to an hour and a half. For this eclipse, the longest period when the moon completely blocks the sun will be about two minutes and 40 seconds. The last total eclipse for the contiguous US was in 1979; the next one will be in 2024.

Here in Yellowstone National Park, the eclipse will start around 10:15 am and last until about 1:00 pm, with the closest to total eclipse occurring around 11:35 am and lasting about 2 minutes.

To find out when the eclipse will be visible for your location check out NASA's Eclipse site.

 
 
NASA image of the moon totally eclipsing the Sun

2017 Solar Eclipse

Learn more about the 2017 solar eclipse and discover which parks are in the path of totality.

NASA logo of total eclipse on August 21, 2017

Total Eclipse – NASA

Visit NASA's official site on the 2017 solar eclipse and learn about solar eclipses, how to view it safely, and see where to watch it.

 

History

For thousands of years people learned about the sun through careful observation. Understanding the sun and seasons was critical to survival. As early as 4,000 years ago, ancient astronomers tried to predict solar eclipses in China and Greece.

More recently, scientists planned experiments during eclipses to test theories and equipment. With the sun blocked, other atmospheric features become visible. Scientists proved Einstein’s theory of relativity, and they searched for a theoretical planet Vulcan but it was proven not to exist.

In 1878, Thomas Edison and other scientists traveled to Wyoming to observe an eclipse. Edison tested his very sensitive thermometer, but it failed.

 

Photography

Special solar filters are required on all camera lenses and telescopes during the partial phase of the eclipse.

View or photograph the eclipse using your personal camera or telescope using special equipment and precautions. If you want to use personal equipment for the eclipse, please learn about the necessary techniques and equipment.

 
Map of the lower 48 showing the path of the 2017 solar eclipse
Path of 2017 solar eclipse across the lower 48 of America

NASA

Last updated: April 20, 2017

Contact the Park

Mailing Address:

P.O. Box 168
Yellowstone National Park, WY 82190-0168

Phone:

(307) 344-7381

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