Transcript for Getting ready for the total solar eclipse
We're, as we have been saying, just a day away from the speck tack ale in the sky. Tomorrow's total eclipse. The first one visible in the continental U.S. In 38 years. It's exciting to everyone from casual viewers to hard core scientists. Let's bring in the chair of scientists at the library on congress. Good morning. Good morning. You say that a Ritz cracker, and I have one here. A whole jar of them here. A Ritz crack ler do the trick. Anything with a tiny hole will do the trick. Even if you have no chance to get to the glasses, you'll still be able to project an image of the sun. So, you can use just a sheet of pain we are a hole in it. A cracker so you can eat it laert. Or you can look for the sun streaming through trees. That's my personal favorite. Is that anywhere that you would have dappled sunlight. The tiny holes between the leaves will project hundreds of images of the crescent sun while it's in eclipse. What can science cysts learn from the eclipse? One of the challenges is that the central disk of the sun is very bright. It makes it difficult to see the outer edge, the Corona. So, in the case of an eclipse, the moon does is a very perfect job of blocking out that bright light. So we can study the outer layers. The reason you would want to do that is that that creates what we call space weather. Streams of radiation. And particles that can impact us here on Earth and affect our power grid. Our communications satellites et et is ra. I was going ask you about animal behavior and whether I should watch my cat. Apparently, the answer is, no. So thank you very much for coming on this morning. Really appreciate it. And so do the people at Ritz cracker. Don't miss our tm coverage of the great American eclipse starting tomorrow at 1:00. As Paula puts one to my face. Right here on ABC. Send us your photos or videos.
This transcript has been automatically generated and may not be 100% accurate.