The stratosphere, mesosphere and lowest part of the thermosphere are collectively referred to as the middle atmosphere, which spans heights from approximately 10 kilometres (33,000 ft) to 100 kilometres (62 mi).
Terrell, Texas. Not to be confused with Terrell County, Texas. Terrell is a city in Kaufman County, Texas, United States. As of the 2010 census, the city population was 15,816. Terrell is located 32 miles (51 km) east of Dallas.
Crosby County, Texas. Crosby County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 6,059. The county seat is Crosbyton. The county was founded in 1876 and later organized in 1886. Both the county and its seat are named for Stephen Crosby, a land commissioner in Texas.