The Total Solar Eclipse app from Exploratorium and the Smithsonian Institution's Solar Eclipse App will live stream the Aug. 21 event?Īt CLC's Grayslake Campus, approved eclipse-viewing sunglasses will be distributed to 500 students on a first-come, first-served basis at 10:30 a.m. What else is good to know about eclipses, including the Aug.
Once the ideas of the Scientific Revolution began to permeate, and eclipses were better understood as natural phenomena, negative interpretations began to disappear, Soybel said. foretold the 'untimely' death of King Henry I, who coincidentally died weeks later." William of Malmesbury, a medieval English astronomer and writer, believed that the eclipse of 1133 A.D. "Eclipses in Chinese history, as with Mesopotamian, Assyrian and medieval English cultures, were associated with bad events. "The Chinese believed that solar eclipses resulted from celestial dragons eating the sun," Soybel explained. The first written observation of an eclipse dates to about the 23rd century B.C. Most ancient and medieval cultures, from the Far East to Europe, saw an eclipse as an omen of ill fortune, said Dr. How did pre-scientific cultures respond to eclipses?
Also, Number 14 welder's glass is considered safe.
#Lunar eclipse 2017 in chicago iso
Inexpensive solar eclipse glasses will be safe- IF they meet the ISO 12312-2 certification requirement. Regular sunglasses are NOT safe to view an eclipse. "Even when 99 percent of the sun's surface is covered by the moon, the remaining sunlight is still intense enough to cause eye retinal burn," Priest said. In Lake County, which is outside the zone of totality, it is NOT safe to view the solar eclipse with the naked eye. What are the critical safety concerns to keep in mind? To see how the sky will look during the eclipse for any observer in the U.S., visit an educational video co-sponsored by Google and the University of California-Berkeley. The sky will resume its normal brightness for that time of day. Daylight won't significantly decrease until about 12:55 p.m.ġ:18 p.m.-Daylight quickly decreases to a minimum, as 86 percent of the sun's disk will be covered and the sky will be eerily dim for a few minutes before it begins to brighten again.Ībout 1:45 p.m. What can Lake County residents expect to see?Īssuming clouds don't block the sun, here's a quick timetable for what will happen:ġ1:53 a.m.-The moon slowly begins to move in front of the sun. Lunar eclipses occur when the Earth is aligned directly between the sun and the moon. Solar eclipses are rare events due to necessary precise alignments of the sun, moon and Earth as well as the shape of the moon's orbit around Earth, Priest said. A total solar eclipse will occur over portions of Southern Illinois, while Lake County will experience a partial eclipse. A total solar eclipse only occurs in the umbra, while a partial eclipse occurs in the lighter part of the shadow (known as the penumbra). The widest portion of the umbra (dark portion of the moon's shadow that is cast upon the Earth) for the Aug. Exactly what is a solar eclipse, and how does it differ from a lunar eclipse?Ī solar eclipse occurs only when the moon is aligned directly between the Earth and the sun, said Eric Priest, CLC meteorology professor.
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