[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-636541-105":59,"doc-detail-636541-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","the-upcoming-total-solar-eclipse-spring-1991-issue-17","The Upcoming Total Solar Eclipse - Spring 1991 Issue 17","","Educational article describing the upcoming total solar eclipse on 11 July 1991, highlighting why it is notable for Hawaii, Mexico, and Central America, and how many will see a partial eclipse across the Americas. It explains what a total eclipse is, when eclipses occur, and how orbital geometry determines whether the Moon’s shadow reaches Earth. 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It specifically includes building a projection camera and using a safe direct solar filter to view the partial eclipse.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},636541,1792832776,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":39,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":46},2336477974920,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","[www.astrosociety.org/uitc](www.astrosociety.org/uitc)  \n[No. 17-Spring 1991](No. 17-Spring 1991)  \n© 1991, Astronomical Society of the Pacific, 390 Ashton Avenue, San Francisco, CA 94112  \nThe Upcoming Total Solar Eclipse!  \nby Andrew Fraknoi, Astronomical Society of the Pacific  \nOn 11 July 1991, people in certain parts of Hawaii, Mexico, and Central America will have a chance to see one of nature's most spectacular sights — a total eclipse of our Sun . And tens of millions of other people across the Americas will see a partial solar eclipse. This event is already being called the \"eclipse of the decade,'' and for good reason! This is the first total eclipse since 1979 to cross any part of the North American continent, and, if you're in the right place, it will be one of the longest eclipses in this century.  \n What is a total eclipse of the Sun?  \n When do eclipses occur?  \n Why is this eclipse so special?  \n What exactly happens during such an eclipse?  \n  How dark will it get?  \n Where and when will the total eclipse be visible?  \n Where and when will the partial eclipse be visible?  \n Aren't eclipses dangerous?  \n When is the next major solar eclipse going to pass over North America?  \n  How can I observe the partial eclipse safely?  \n Table of Partial Eclipse Times  \n Activity \\#1: Building a Projection Camera for Safe Eclipse Viewing  \n Activity \\#2: Building a Safe Direct Solar Filter  \n  For Further Reading  \nWhat is a total eclipse of the Sun?  \nEclipses are unique astronomical events, occurring when the Earth, Moon, and Sun are exactly aligned in space. A solar eclipse occurs when our Moon passes in front of the Sun, casting a shadow across a portion of the Earth's surface. From some vantage points on the Earth, the Moon will only seem to block a piece of the Sun, and the Moon's shadow will not be completely dark. This is called a partial eclipse. But when the alignment is just right, observers in a few lucky locations on the Earth will see the Moon appear to cover the entire disc of the Sun . The Moon's shadow will be completely black, and \"darkness will come across the skies. '' This is called a total eclipse.  \nThe size of the Moon's shadow that we see depends on the distances, and sizes, of both the Moon and the Sun . By the time the Moon's dark shadow reaches our planet during a total eclipse, it is only about 200- 300 kilometers wide. As the Earth rotates on its axis, that dark shadow seems to sweep across our planet, creating a path of total darkness. Observers must be within that path, called the path of totality, at the  \nright time, to see a total solar eclipse. Observers on either side of this path — almost 2,200 miles on either side — will see only the partial eclipse.  \nThe shadow cast by our Moon 384,400 kilometers away would be similar in size to the shadow of a marble on a tennis ball 2 meters away. On this scale, the Sun would be a sphere 7 meters (23 feet) in diameter almost 750 meters away.  \nWhen do eclipses occur?  \nAs the Moon orbits our planet, it sometimes comes between the Earth and Sun; sunlight falls on the side of the Moon not visible from Earth, and we say that the Moon is in its \"new'' phase. Solar eclipses can only occur at the new Moon, but not every new Moon results in a solar eclipse. The Moon's monthly orbit around the Earth is tilted slightly, and it can pass as much as 5 degrees above or below a line between the Earth and Sun . In that case, the Moon's shadow will miss the Earth, and no eclipse will be seen . Thus, a solar eclipse is possible only when the Moon is exactly on that Earth-Sun line, and in the new phase.  \nWhy is this eclipse so special?  \nNot every solar eclipse is a total eclipse! About 35 percent of the time, the Moon does not completely cover the Sun, and we see a partial eclipse. Since the Moon orbits the Earth on an elliptical path, and not along a perfect circle, its distance from the Earth varies. Occasionally, solar eclipses will occur when the Moon is at i","cbCait861Ic4ozCW","https://ap.wps.com/l/cbCait861Ic4ozCW","pdf",189954,"English","# The Upcoming Total Solar Eclipse!\n## What is a total eclipse of the Sun?\n## When do eclipses occur?\n## Why is this eclipse so special?\n## What exactly happens during such an eclipse?\n## Aren't eclipses dangerous?\n## How can I observe the partial eclipse safely?\n## Activity #1: Building a Projection Camera for Safe Eclipse Viewing\n## Activity #2: Building a Safe Direct Solar Filter\n## For Further Reading","[{\"question\":\"What makes an eclipse a total solar eclipse?\",\"answer\":\"A total solar eclipse occurs when the Earth, Moon, and Sun are aligned so the Moon covers the entire disc of the Sun. Observers within the path of totality see the Moon’s shadow appear completely black.\"},{\"question\":\"Why don’t all new Moons cause solar eclipses?\",\"answer\":\"Solar eclipses require the Moon to be exactly on the Earth–Sun line in its new phase. The Moon’s orbit is tilted, so its shadow can miss Earth and no eclipse is seen.\"},{\"question\":\"Are eclipses dangerous to watch, and how can the partial eclipse be observed safely?\",\"answer\":\"The document addresses safety concerns and recommends safe observation methods. It specifically includes building a projection camera and using a safe direct solar filter to view the partial eclipse.\"}]","The Upcoming Total Solar Eclipse - Spring 1991 Issue 17 | PDF",1792678463]