As of the census of 2000, there were 107,616 people, 40,245 households, and 27,688 families residing in the city. The population density was 1,4...
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!
Pomona, California, located in the heart of Los Angeles County, is the county seat and most populous city of Los Angeles County. As of the 2010 census, the city population was 129,643. Pomona is known for its rich history, its collegiate atmosphere, and its proximity to Los Angeles.
According to the United States Census Bureau, the city has a total area of , of which, is land and is water. The city is located in the Santiago Hills, southeast of Downtown Los Angeles.
Pomona is located in the eastern portion of the Greater Los Angeles Area. It is bordered by the cities of Claremont and Hemet to the north, Diamond Bar and Upland to the east, and West Covina to the southeast.
Pomona has a dry Mediterranean climate, with warm dry summers and mild, wet winters. Occasional Santa Ana winds can gust over .
Pomona lies in the eastern part of the Los Angeles Basin, south of the San Gabriel Mountains and the Inland Empire and west of the San Bernardino Mountains.
The Chino Hills, consisting of the extinct Chino Volcanic Field, form the eastern boundary of Pomona. In the middle of the city is Mt. Baldy, considered to be both the city's skyline and its cultural icon.
The city of Pomona has had many residential developments since 2000, when the city adopted its current General Plan. Development in the city has been tightly controlled, with a focus on Wellesley Hills, a planned community southeast of the city, and many other developments in the city's northeastern and eastern edges.
Pomona's history spans over 2,000 years, with a pre-Hispanic period, a Spanish mission period, and early growth as a Mexican settlement. The city of Pomona was founded in 1887 by George and Louisa May Wright, who purchased the land from the heirs of Nicolas Chalmer. Pomona's first buildings were constructed in the Wright style of architecture.
The present-day main downtown area includes the Union Pacific Railroad viaduct and Pomonaan Plaza, which are both prominently featured in Los Angeles County's chapter of the California Register of Historic Places.
Pomona is home to one of the nation's most prestigious colleges, Claremont McKenna College, as well as the University of Southern California and the University of California, Riverside.
As of the census of 2000, there were 107,616 people, 40,245 households, and 27,688 families residing in the city. The population density was 1,475.6 people per square mile (594.0/km²). There were 41,427 housing units at an average density of 569.2 per square mile (220.1/km²). The racial makeup of the city was 94.34% White, 1.27% African American, 0
}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.