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This technique is especially useful during solar eclipses: the projected image will show all the phases of the eclipse, just as the real Sun does.

The hole will project a small image of the Sun's disk onto the lower card. Poke a small hole in an index card with a pencil point, face it toward the Sun, and hold a second card three or four feet behind it in its shadow. The simplest safe method of how to look at the sun is to watch the Sun's image projected onto a piece of paper. The smaller the pinhole, the sharper (but dimmer) the image. You'll get a great view if you project a sunlight coming through a small hole onto a viewing card enclosed in a long box. Pinhole projection is the simplest and safest way to observe the Sun. If you’re observing the Sun without any optical aid, all you really need are low-cost solar observing glasses from companies such as Rainbow Symphony or our online store. There are numerous ways you can observe the beauty of the Sun with complete confidence that nothing bad will happen to your eyes. Using a Telescope or Binoculars to Look at the Sun.This article covers a wide range of options: Given these caveats, here’s some practical advice on how to look at the sun to safely observe sunspots and solar eclipses alike. To observe the Sun safely, you need to filter out more than 99% of the Sun’s light before it reaches your eyes. The danger is obvious: its disk is so bright that prolonged, direct exposure can cause permanent damage to the retina, leading to loss of vision or blindness. While it's easy to learn how to look at the sun as there are several right ways, there are also many wrong ways to view the Sun. Kids can safely view the Sun with the right equipment, as demonstrated at the solar star party at the Northeast Astronomy Forum.