Never try to look directly at the sun unless using a store bought filter specifically designed for that. Stores that sell telescopes should also carry them. The best way is to look at a projection of the sun. Get a shoebox and poke a hole in one end. The hole should not be too big. Bigger than a pin hole but still pretty small. Place a piece of paper at the other end of the box. Point the end with the hole at the sun and watch the projection on the paper. Never look directly at the sun, even during an eclipse.

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