Block · one region of the page, as the scanner read it. It may hold a whole story, part of one, several, or an advertisement; stitching blocks into articles is the next step. Text is supplied OCR.
Page 10 · column 6 of 9 · from the scan, no model involved
Fall arrives on Thursday. September 23. at 4:46 a.m. EDT—the moment when the sun crosses Earth’s equator. This moment marks the autumnal equinox—the official beginning of fall in the northern hemisphere. The word equinox means equal night so most people expect the length of day and night to be exactly the same all over Earth at the time of the equinox. But, according to Dr. Paul H. Knappenberger Jr., director of the Science Museum of Virginia, the sun does not remain in the sky exactly twelve hours until September 27. several days later than the equinox. “The reason for this.” Knappenberger explained, "is that the bending of light by Earth's atmosphere enables us to see the sun rise while it is still Vj degree below the true horizon and we do not see it disappear until it is Vi degree below the western horizon. So, the sun appears to rise two minutes earlier and set two minutes later than it would if there were no atmosphere to bend its light.”
From the moment of fall’s arrival until the beginning of spring, the sun is south of the equator, providing less heat in the northern hemisphere but bringing warmer temperatures to the southern hemisphere. “This seasonal change doesn’t mean we’ll be getting cooler temperatures right away,” Knappenberger noted. "Earth’s climate doesn’t repond instantly to the sun’s movements because our oceans act as large heat reservoirs. moderating temperature changes. Weather lags about two to three months behind the sun. That’s why summer heat can last into September and some of our coldest days often come in February.”
80.6%