The Great American Eclipse is fast approaching, and is now just 100 days away, with scientists and the general public gearing up for what is sure to be quite the event.

The moon, sun, and Earth will align this summer, blocking sunlight from reaching the Earth in the middle of the day. It will also cause temperatures to plunge, and bright stars to be visible in the middle of the daytime, certainly a surreal experience.

The eclipse will take place on Aug. 21, during which the sun’s corona will be visible in the sky. It will be the first total solar eclipse of the sun since 1918, making this a once in a lifetime event.

The best view will be in Oregon and South Carolina, where there will be a 70 mile stretch where you can view the eclipse in its entirety.