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Relationship of the atmosphere and ionosphere. The ionosphere (/ aɪ ˈ ɒ n ə ˌ s f ɪər /) [1] [2] is the ionized part of the upper atmosphere of Earth, from about 48 km (30 mi) to 965 km (600 mi) above sea level, [3] a region that includes the thermosphere and parts of the mesosphere and exosphere. The ionosphere is ionized by solar ...
Mariah Carey's "Touch My Body" becomes her 18th U.S. chart-topper, setting the record for most U.S. number ones singles by a solo artist – only behind the Beatles with 20 – and most weeks at number one on the Hot 100 chart with a total of 79.
Timeline of music in the United States; To 1819; 1820–1849; 1850–1879; 1880–1919; 1920–1949; 1950–1969; 1970–present; Music history of the United States; Colonial era – to the Civil War – During the Civil War – Late 19th century – 1900–1940 – 1950s – 1960s – 1970s – 1980s
Since music can be endlessly broken down into smaller and smaller categories, a genealogical chart will usually focus on one major genre and its different strains. How these developed out of one another is shown in a genealogical chart, often with major figures or innovators of each subgenre. A simplified example appears below.
International Reference Ionosphere (IRI) is a common permanent scientific project of the Committee on Space Research (COSPAR) and the International Union of Radio Science (URSI) started 1968/69. It is the international standard empirical model for the terrestrial ionosphere since 1999.
This section shows the Japan-specific timeline of music technology. Note: Some items in the list are not the first even in Japan. 1934 : NEC engineer Akira Nakishima's switching circuit theory lays foundations for digital circuit design [9] 1935 : Yamaha releases Magna Organ, an early electrostatic reed organ [10] [11]
Date ranges of classical music eras are therefore somewhat arbitrary, and are only intended as approximate guides. Scholars of music history do not agree on the start and end dates, and in many cases disagree whether particular years should be chosen at all. The 20th century has exact dates, but is strictly a calendar based unit of time.
The birth of soul music occurred during the 1950s, and the genre would come to dominate the US R&B charts by the early 1960s. Soul artists of the 1950s include Sam Cooke and James Brown. [8] Jazz music was revolutionized during the 1950s with the rise of bebop, hard bop, modal jazz, and cool jazz.