For anyone currently alive and living in USA, mark August 21, 2017 on the calendar
I could never hope to put together words that describe the beauty and majesty of a solar eclipse. As the moon blocks out the sunlight, your skin crawls. For just a moment (2 mins 40sec) all the rest of world seems not to matter. Everything falls away and you finally really see the Sun. Everything falls away and you feel small, scared and entirely insignificant.
Now, If you live on mainland USA, consider how lucky you are. First, the moon and earth are the only two bodies in the solar system of exactly the right size and distance apart to create a total eclipse. Second, the moon is gradually moving away from the earth. Several tens of thousands of years ago, the moon was too close and so too large in the sky. Several tens of thousands of years from now it will be too far away and too small in the sky. Third, most solar eclipses occur over the sea or in places difficult to reach ( and expensive). But in 2017 all you have to do is pop a tent in your car and drive. Go see this event. It will stick in your mind for the rest of your life and you too will struggle for words to describe it.