Every eclipse of the Sun, something sad happens. Just a few days before the eclipse is when most people realize it's coming. They try and get ready to have a safe eclipse watching experience. They look for eclipse glasses and there aren't any because they're sold out. So the only way to avoid that is to prepare in advance. For a partial eclipse in 2012, one hardware store in Boulder, Colorado ordered 10,000 pairs of eclipse glasses. They sold them all for $2 each and they ran out. Isn't that hard to believe? But there were lines of people through the store because so many people wanted to watch the eclipse and 10,000 wasn't enough. >> At first it was very easy, we do our normal procedures, we'll put them on hold for customers. But the volume quickly, quickly increased. We just had to tell people it was first come, first serve. We were limiting two per customer because they're going to evaporate. And they did, over and over again. >> Sometimes customers would be mad at us. It's like, what do you mean you ran out? Why didn't you order more? Well, I thought 2,000 was enough. We never ordered 2,000 of anything and we sold out. And we ordered 2,000 more and we sold out. And we ordered 2,000 more. >> We had a line in the store from the reception desk, probably going almost to the middle of the store, of about maybe 100 to 150 people waiting and hoping that they would get some eclipse glasses, the final ones. >> So we encourage you now that you've taken this course and know so much about eclipses maybe you personally want to run an eclipse watching event. Maybe you want to sell or give away safe eclipse watching glasses. Maybe you want to work with a school, a park, a neighborhood civic organization like the Rotary or the Lions or the Kiwanis. You now have the ability to help your neighbors enjoy this total eclipse of the sun, in ways they otherwise would not be able to experience >> Sir, I've heard there can be really dangerous radiation during an eclipse. >> Yeah, I heard that too, is that right? >> Well, on eclipse day the Sun's radiation is there like any other day. And the Sun is very, very powerful. You wouldn't look at the Sun today because it would hurt your eyes. So all that's different on eclipse day is that you want to look at the Sun. So how can you do that safely? You can use safe, specially made eclipse-watching glasses, you can project an image of the Sun on a piece of paper, you can go to a local planetarium. All of those things are safe and we encourage you to watch the eclipse, but watch it safely. So it's not true that there's any special radiation on eclipse day. It's a rumor, it's a false rumor. It's just the Sun. But treat the Sun with respect, protect your eyes, and have a fantastic experience. Watch the eclipse. If you have access to a pair of binoculars, you could make an excellent image of the Sun. Don't look at the Sun, of course, but let the sunlight go through the binoculars and out the eye pieces. Take a piece of white paper and focus the binoculars until the edge of the Sun's image is as sharp as can be. And then look, you can see a sun spot and then another sun spot. And this is a great way to see an eclipse. This is a lot easier if you can put your binoculars on a tripod, like I've done here. A lot of camera stores will sell a little adapter. If you can't put them on a tripod, put them on a table, prop them up with some books. And remember, don't look through. Now how do you point the binoculars at the Sun if you can't look through them? That's easy, make the shadow of the binoculars as small as possible. And when the binoculars are pointing right toward the Sun, there'll be a small, round shadow. And when you've got the pointing just right, the sun will come out the eyepieces and make a nice image of the Sun. If you decide that two images of the Sun are a bit confusing, just take a piece of cardboard and block off one half of the binoculars and then you'll end up with one nice image of the Sun.