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In aviation a ground-controlled approach (GCA), is a type of service provided by air-traffic controllers whereby they guide aircraft to a safe landing, including in adverse weather conditions, based on primary radar images. Most commonly a GCA uses information from either a Precision Approach Radar (PAR, for precision approaches with vertical, glidepath guidance) or an Airport Surveillance Radar (ASR, providing a non-precision Surveillance radar approach with no glidepath guidance). The term GCA may refer to any type of ground radar guided approach such as a PAR, PAR without glideslope or ASR. When both vertical and horizontal guidance from the PAR is given, the approach is termed a precision approach. If no PAR glidepath is given, even if PAR equipment is used for lateral guidance, it is considered a non-precision approach.

Not My Responsibility is an interlude written and produced by American singer-songwriter Billie Eilish. A visual spoken word piece, the short film version depicts Eilish slowly taking off her clothes whilst addressing and criticizing public body shaming of her and others; and the negative opinions of others about her body and clothing choices, before submerging into a black-colored substance.

The film was originally premiered during Eilish's Where Do We Go? World Tour in March 2020 as a visual interlude. The video received 28 million views on YouTube and 18 million on Instagram within its first five days of release. The video received positive reviews from fans and critics alike, praising the tone and subject matter. The audio version was later released as part of Eilish's second studio album Happier Than Ever (2021), where it serves as a spoken word piece and interlude.

INFO: Full form for ECA is Electronics Control Assembly in Space Science category
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INFO: Full form for ECA is Engineering Change Analysis in Space Science category
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INFO: Full form for ECA is Epoxy Curing Agent in Space Science category
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INFO: Full form for EAS is Equivalent Air Speed in Space Science category
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INFO: Full form for MTR is Magnetic Tape Recorder in Space Science category
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Jan Hendrik Oort ( or ; 28 April 1900 – 5 November 1992) was a Dutch astronomer who made significant contributions to the understanding of the Milky Way and who was a pioneer in the field of radio astronomy. His New York Times obituary called him "one of the century's foremost explorers of the universe"; the European Space Agency website describes him as "one of the greatest astronomers of the 20th century" and states that he "revolutionised astronomy through his ground-breaking discoveries." In 1955, Oort's name appeared in Life magazine's list of the 100 most famous living people. He has been described as "putting the Netherlands in the forefront of postwar astronomy."

Oort determined that the Milky Way rotates and overturned the idea that the Sun was at its center. He also postulated the existence of the mysterious invisible dark matter in 1932, which is believed to make up roughly 84.5% of the total matter in the Universe and whose gravitational pull causes "the clustering of stars into galaxies and galaxies into connecting strings of galaxies". He discovered the galactic halo, a group of stars orbiting the Milky Way but outside the main disk. Additionally Oort is responsible for a number of important insights about comets, including the realization that their orbits "implied there was a lot more solar system than the region occupied by the planets."

The Oort cloud, the Oort constants, and the asteroid, 1691 Oort, were all named after him.

Omicron (uppercase Ο, lowercase ο, literally 'small o': όμικρον < ὂ μικρόν - ò mikrón, micron meaning 'small' in contrast to omega) is the 15th letter of the Greek alphabet. In the system of Greek numerals it has a value of 70. This letter is derived from the Phoenician letter ayin . In classical Greek, omicron represented the sound [o] in contrast to omega [ɔː] and ου [oː]. In modern Greek, omicron represents the mid back rounded vowel /o̞/ , the same sound as omega. Letters that arose from omicron include Roman O and Cyrillic O.

Out may refer to:

INFO: Full form for CAR is Cloud Absorption Radiometer in Space Science category
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INFO: Full form for CAR is Certification Approval Request in Space Science category
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INFO: Full form for TL is Thrust Level in Space Science category
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INFO: Full form for TL is Time Latest in Space Science category
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