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There in the final last few seconds. In kelly, kentucky, Something Else emerges in the sky. We can see venus here at this point in kelly, kentucky. I love the fact that you can see venus. Even the president stepping out of the white house to watch. Finally, the last major stop for the Great American eclipse charleston, south carolina. The clouds cooperating. You know, it really puts us in our place as far as our role in the cosmos, doesnt it, the fact that we here on earth are part of something much bigger. And then sky gazers starting to make the long journey home. In remote rigby, idaho, bum...

Way. and rob marciano, nasa wanted to study that corona today, the sun's atmosphere. we don't see it with the naked eye, but many americans saw the corona today. >> reporter: something you can only see during a total eclipse. it's the outer atmosphere of the sun. a plasma of hydrant, and it burns really, really hot, and it turns different colors throughout the event, so it's certainly something spectacular to see. >> and rob, that diamond ring, the stunning moment as we traveled from state to state, what causes that effect? >> reporter: well, you know, the surface of the moon is not regular, s...

The shape of the corona was unexpected. i expect to spend time looking at the corona today. >> looking at it, but looking at it safely. what's your advice for first-time eclipse users? >> i would say have those total shades. if you're in the total, the first hour and 20 minutes or so will be a partial eclipse. to see the moon slide across the sun you will need approved solar filters. during totality, the filters come off the filters, you can remove the shades and look at totality with the naked eye before that, it's extremely important to protect your eyes, and use solar filters. and only a ce...