![]() ![]() Toward the end of his life, Galileo did go blind, but this was more than two decades after his direct solar observations. Later, Galileo's student Benedetto Castelli discovered the projection method for looking at the Sun (using a pinhole camera), which Galileo felt was a far superior method of solar observation. He may even have looked at the Sun through a low power telescope. So, despite the feeling of foreboding, he walked down the corridor, leaving his friend to tackle the first circle. It often seems like a curtain of darkness falls (doctors call this amaurosis fugax). Come on, we’ve got three circles to make down here and we need to get to the far staircase, George muttered after a while, nudging Lockwood lightly. Clots can cause temporary blindness in one eye, usually lasting 20 to 30 minutes. And it’s pretty widespread, though estimates of its prevalence vary. Galileo found the addition of fog particularly useful, because it allowed Galileo to observe sunspots on the Sun.Īlthough we don't know how often Galileo looked directly at the Sun, we know from his letters that he made several observations. They stood there, staring down the corridor, their hearts hammering. When you look at the sun, you are slowly burning your corneas to death. Eye strain from staring at a computer is so common it has its own name: computer vision syndrome. This not only makes the Sun less intense, it gives the Sun its reddish glow. When the Sun is low in the sky its light must travel through much more atmosphere to reach us. He looked when the Sun was low on the horizon at dawn or sunset, often when somewhat obscured by fogs or clouds. He never looked directly at the Sun when it was high in the sky. This was not one of Galileo's best ideas, but he did try to be careful about it. As part of his work he looked directly at the Sun many times. Lou Tomososki, 70, of Oregon City, Oregon recalled how he lost some of his eyesight over 50 years ago when he and a friend looked up at the sky and directly trained their eyes on the sun during a. But Galileo also made naked-eye observations of the heavens. This particular injury whose medical name is actually solar retinopathy, happens when bright light, say from the sun enters your pupil in the front of your eye and then deluges the retina at the. His discovery of the the moons of Jupiter and the phases of Venus changed our understanding of the solar system. Galileo is most famous for his telescopic observations.
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