East Greenville is home to several colleges and universities, including the Pennsylvania State University-East Campus, the John F. Kennedy Unive...
Sunset
Twilight
Darkness
Most people know that sunset is the time when the sun goes down. But did you know that the sun doesn't actually set? Instead, Earth rotates into darkness, giving us the illusion that the sun is setting. So what causes sunset?
Well, it's a combination of things. The Earth's atmosphere scatters sunlight in every direction, but blue and violet light are scattered more than other colors. This is why the sky is usually blue during the daytime. As the sun gets lower in the sky, the atmosphere becomes thicker and more dense.
This scattering of sunlight happens to a greater extent, and we see red and orange light more than blue and violet light. That's why sunset is usually a beautiful red or orange color. So next time you see sunset, remember that you're actually seeing Earth rotate into darkness!
East Greenville is located in Chester County, Pennsylvania, just southwest of Philadelphia. The city has a population of 27,789 as of the 2010 census, making it the largest municipality by population in Chester County. East Greenville is bordered by the borough of West Chester to the south and east, Bartram to the north, and Swarthmore to the west. The city's geographic location has been a significant contributing factor in its long history and prosperity. East Greenville is just north of the 32nd Parallel, making it one of the coldest locations in Pennsylvania during the winter. The city experiences a humid subtropical climate throughout the year.
East Greenville is situated on the eastern banks of Chester Creek, which flows from the Appalachian Mountains to the Delaware River. The city's namesake is General Ebenezer East Greenville, a signer of the Declaration of Independence and a Revolutionary War hero.
East Greenville is home to several colleges and universities, including the Pennsylvania State University-East Campus, the John F. Kennedy University, and Saint Joseph's University-Pennsylvania. The city is also home to a number of businesses, including Hershey Foods Corporation, Cardinal Health, and East Greenville Utilities. The city's notable citizens include actors Glenn Close and Tim Allen, fashion designer Christian Siriano, and violinist Itzhak Perlman.
}As the sun sets, the sky slowly grows dark. For many people, this is a time to relax and wind down for the day. But have you ever wondered exactly when it gets dark? The answer may surprise you.
Did you know that darkness actually begins long before the sun sets? As the sun gets lower in the sky, its light has to travel through more atmosphere. This filters out some of the blue light, making the sun look redder. At the same time, shadows get longer and darker. So by the time the sun finally dips below the horizon, darkness has already begun to fall.
Of course, not all places on Earth experience darkness at the same time. Near the equator, the sun sets and rises almost directly overhead. This means that there is less of a difference between daytime and nighttime. Closer to the poles, however, the sun stays low in the sky for much of the year. This leads to longer periods of darkness during wintertime.