Satellite

In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as Earth's Moon.

The world's first artificial satellite, the Sputnik 1, was launched by the Soviet Union in 1957. Since then, thousands of satellites have been launched into orbit around the Earth. Some satellites, notably space stations, have been launched in parts and assembled in orbit. Artificial satellites originate from more than 40 countries and have used the satellite launching capabilities of ten nations. About a thousand satellites are currently operational, whereas thousands of unused satellites and satellite fragments orbit the Earth as space debris. A few space probes have been placed into orbit around other bodies and become artificial satellites to the Moon, Mercury, Venus, Mars, Jupiter, Saturn, Vesta, Eros, Ceres, and the Sun.

Satellites are used for a large number of purposes. Common types include military and civilian Earth observation satellites, communications satellites, navigation satellites, weather satellites, and research satellites. Space stations and human spacecraft in orbit are also satellites. Satellite orbits vary greatly, depending on the purpose of the satellite, and are classified in a number of ways. Well-known (overlapping) classes include low Earth orbit, polar orbit, and geostationary orbit.

Satellite (moth)

The Satellite (Eupsilia transversa) is a moth of the family Noctuidae. It is distributed throughout the Palearctic.

This is a fairly variable species with greyish or reddish brown forewings, often marked with darker bands. The common name derives from the prominent stigma, ranging in colour from white or yellow to red, which has two smaller spots close to it, apparently “in orbit”. The hindwings are brown with a paler fringe. The wingspan is 40–48 mm. This species flies at night from September to April and is active on mild nights throughout the winter. It will come to light but is more strongly attracted to sugar and various flowers.

Distribution

The species ranges from Ireland to Japan. Specifically, south to Northern Spain, Sardinia, Central Italy then Macedonia, Bulgaria, Asia minor and the Caucasus East to Central Asia and the Russian Far East and Siberia before reaching Japan. In the North, the geographical presence extends to Scotland and the Orkney Islands. Individuals are reported by Iceland. In Fennoscandia the range extends almost to the Arctic Circle, as well as in northern Russia. The species is very cold tolerant and lives in a variety of habitats, from forests to open grasslands, from the lowlands up to above the tree line. From temperate areas to the subarctic tundra. The species rises up to 1800 m in the Alps.

Natural satellite

A natural satellite is a celestial body that orbits another celestial body of greater mass (e.g., a planet, star, or dwarf planet), which is called its primary. For example, the Moon is a natural satellite of Earth, and Earth is a natural satellite of the Sun.

In the Solar System there are 173 known natural satellites which orbit within 6 planetary satellite systems. In addition, several other objects are known to have satellites, including three IAU-listed dwarf planets: Pluto, Haumea, and Eris.As of January 2012, over 200 minor-planet moons have been discovered. There are 76 known objects in the asteroid belt with satellites (five with two each), four Jupiter trojans, 39 near-Earth objects (two with two satellites each), and 14 Mars-crossers. There are also 84 known natural satellites of trans-Neptunian objects. Some 150 additional small bodies have been observed within the rings of Saturn, but only a few were tracked long enough to establish orbits. Planets around other stars are likely to have satellites as well, and although numerous candidates have been detected to date, none have yet been confirmed.

Africa (Toto song)

"Africa" is a 1982 song by the American rock band Toto. It was included on their 1982 album Toto IV, and released as a single in late 1982. It reached number one on the US Billboard Hot 100 chart in February 1983 and number three on the UK Singles Chart the same month. The song was written by the band's keyboardist/vocalist David Paich and drummer Jeff Porcaro.

Background

The initial idea for the song came from David Paich. Jeff Porcaro explains the idea behind the song: "a boy is trying to write a song on Africa, but since he's never been there, he can only tell what he's seen on TV or remembers in the past."

David Paich said: "At the beginning of the '80s I watched a late night documentary on TV about all the terrible death and suffering of the people in Africa. It both moved and appalled me and the pictures just wouldn't leave my head. I tried to imagine how I'd feel about if I was there and what I'd do."

Musically the song took quite some time to assemble, as Paich and Porcaro explain:

Africa (Petrarch)

Africa is an epic poem in Latin hexameters by the 14th century Italian poet Petrarch (Francesco Petrarca). It tells the story of the Second Punic War, in which the Carthaginian general Hannibal invaded Italy, but Roman forces were eventually victorious after an invasion of north Africa led by Publius Cornelius Scipio Africanus, the epic poem's hero.

Background

Africa and De viris illustribus were partially inspired by Petrarch's visit to Rome in 1337. According to Bergin and Wilson (p. ix). It seems very likely that the inspirational vision of the Eternal City must have been the immediate spur to the design of the Africa and probably De viris illustribus as well. After returning from his grand tour, the first sections of Africa were written in the valley of Vaucluse. Petrarch recalls

The fact that he abandoned it early on is not entirely correct since it was far along when he received two invitations (from Rome and from Paris) in September 1340 each asking him to accept the crown as poet laureate. A preliminary form of the poem was completed in time for the laurel coronation April 8, 1341 (Easter Sunday).

Africa (Perpetuum Jazzile album)

Africa is 2009 Perpetuum Jazzile album. By large most successful song from the album is a capella version of Toto's "Africa", the performance video of which has received more than 15 million YouTube views since its publishing in May 2009 until September 2013.

Track listing

References