Landsat 4 is the fourth satellite of the Landsat program. It was launched on July 16, 1982, with the primary goal of providing a global archive of satellite imagery. Although the Landsat Program is managed by NASA, data from Landsat 4 was collected and distributed by the U.S. Geological Survey. Landsat 4 science operations ended on December 14, 1993, when the satellite lost its ability to transmit science data, far beyond its designed life expectancy of five years. The satellite housekeeping telemetry and tracking continued to be maintained by NASA until it was decommissioned on June 15, 2001. Background Landsat 1, then known as ERTA-A, was launched July 23, 1972. The satellite took over 100,000 images of the Earth over the course of its life. Landsat 2 had a similar design, and was launched three years later. Landsat 3, launched in 1978, was the last satellite to have a similar design to Landsat 1, and was the last Landsat to be managed by NASA during the Landsat program. Landsat 4 was the first Landsat to be operated by NOAA.The second generation of Landsat, Landsat 4 and 5, flew in lower...

Landsat 4 is the fourth satellite of the Landsat program. It was launched on July 16, 1982, with the primary goal of providing a global archive of satellite imagery. Although the Landsat Program is managed by NASA, data from Landsat 4 was collected and distributed by the U.S. Geological Survey. Landsat 4 science operations ended on December 14, 1993, when the satellite lost its ability to transmit science data, far beyond its designed life expectancy of five years. The satellite housekeeping telemetry and tracking continued to be maintained by NASA until it was decommissioned on June 15, 2001. Background Landsat 1, then known as ERTA-A, was launched July 23, 1972. The satellite took over 100,000 images of the Earth over the course of its life. Landsat 2 had a similar design, and was launched three years later. Landsat 3, launched in 1978, was the last satellite to have a similar design to Landsat 1, and was the last Landsat to be managed by NASA during the Landsat program. Landsat 4 was the first Landsat to be operated by NOAA.The second generation of Landsat, Landsat 4 and 5, flew in lower...

Landsat 4 is the fourth satellite of the Landsat program. It was launched on July 16, 1982, with the primary goal of providing a global archive of satellite imagery. Although the Landsat Program is managed by NASA, data from Landsat 4 was collected and distributed by the U.S. Geological Survey. Landsat 4 science operations ended on December 14, 1993, when the satellite lost its ability to transmit science data, far beyond its designed life expectancy of five years. The satellite housekeeping telemetry and tracking continued to be maintained by NASA until it was decommissioned on June 15, 2001. Background Landsat 1, then known as ERTA-A, was launched July 23, 1972. The satellite took over 100,000 images of the Earth over the course of its life. Landsat 2 had a similar design, and was launched three years later. Landsat 3, launched in 1978, was the last satellite to have a similar design to Landsat 1, and was the last Landsat to be managed by NASA during the Landsat program. Landsat 4 was the first Landsat to be operated by NOAA.The second generation of Landsat, Landsat 4 and 5, flew in lower...

Landsat 4 is the fourth satellite of the Landsat program. It was launched on July 16, 1982, with the primary goal of providing a global archive of satellite imagery. Although the Landsat Program is managed by NASA, data from Landsat 4 was collected and distributed by the U.S. Geological Survey. Landsat 4 science operations ended on December 14, 1993, when the satellite lost its ability to transmit science data, far beyond its designed life expectancy of five years. The satellite housekeeping telemetry and tracking continued to be maintained by NASA until it was decommissioned on June 15, 2001. Background Landsat 1, then known as ERTA-A, was launched July 23, 1972. The satellite took over 100,000 images of the Earth over the course of its life. Landsat 2 had a similar design, and was launched three years later. Landsat 3, launched in 1978, was the last satellite to have a similar design to Landsat 1, and was the last Landsat to be managed by NASA during the Landsat program. Landsat 4 was the first Landsat to be operated by NOAA.The second generation of Landsat, Landsat 4 and 5, flew in lower...

The Parthenon frieze is the high-relief Pentelic marble sculpture created to adorn the upper part of the Parthenon’s naos. It was sculpted between c. 443 and 437 BC, most likely under the direction of Pheidias. Of the 160 meters (524 ft) of the original frieze, 128 meters (420 ft) survives—some 80 percent. The rest is known only from the drawings attributed to French artist Jacques Carrey in 1674, thirteen years before the Venetian bombardment that ruined the temple. Along with the Metopes of the Parthenon and Pediments of the Parthenon it forms the bulk of surviving sculpture from the building. The majority of the frieze is at the British Museum in London (forming the major part of the Elgin Marbles); the largest proportion of the rest is at the Acropolis Museum in Athens, and the remainder of fragments shared between six other institutions. Casts of the frieze may be found in the Beazley archive at the Ashmolean Museum at Oxford, at the Spurlock Museum in Urbana, in the Skulpturhalle at Basel and elsewhere. The part of the frieze in London has been claimed by Greece, and British and Greek authorites are negotiating over its future. ...

The Trifid Nebula (catalogued as Messier 20 or M20 and as NGC 6514) is an H II region in the north-west of Sagittarius in a star-forming region in the Milky Way's Scutum-Centaurus Arm. It was discovered by Charles Messier on June 5, 1764. Its name means 'three-lobe'. The object is an unusual combination of an open cluster of stars, an emission nebula (the relatively dense, reddish-pink portion), a reflection nebula (the mainly NNE blue portion), and a dark nebula (the apparent 'gaps' in the former that cause the trifurcated appearance, also designated Barnard 85). Viewed through a small telescope, the Trifid Nebula is a bright and peculiar object, and is thus a perennial favorite of amateur astronomers.The most massive star that has formed in this region is HD 164492A, an O7.5III star with a mass more than 20 times the mass of the Sun. This star is surrounded by a cluster of approximately 3100 young stars. Characteristics The Trifid Nebula was the subject of an investigation by astronomers using the Hubble Space Telescope in 1997, using filters that isolate emission from hydrogen atoms,...

Morning glory (also written as morning-glory) is the common name for over 1,000 species of flowering plants in the family Convolvulaceae, whose current taxonomy and systematics are in flux. Morning glory species belong to many genera, some of which are: Argyreia Astripomoea Calystegia Convolvulus Ipomoea (the largest genus) Lepistemon Merremia Operculina Rivea StictocardiaAs the name suggests, most morning glory flowers unfurl into full bloom in the early morning. The flowers usually start to fade a few hours before the corolla begins to display visible curling. They prefer full solar exposure throughout the day, and mesic soils. Some morning glories, such as Ipomoea muricata, Ipomoea alba, and Ipomoea macrorhiza, are night-blooming flowers. History Ipomoea nil, a species of morning glory, was first known in China for its medicinal uses, due to the laxative properties of its seeds. Ancient Mesoamerican civilizations...

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Genealogy (from Ancient Greek γενεαλογία (genealogía) 'the making of a pedigree') is the study of families, family history, and the tracing of their lineages. Genealogists use oral interviews, historical records, genetic analysis, and other records to obtain information about a family and to demonstrate kinship and pedigrees of its members. The results are often displayed in charts or written as narratives. The field of family history is broader than genealogy, and covers not just lineage but also family and community history and biography.The record of genealogical work may be presented as a "genealogy", a "family history", or a "family tree". In the narrow sense, a "genealogy" or a "family tree" traces the descendants of one person, whereas a "family history" traces the ancestors of one person, but the terms are often used interchangeably. A family history may include additional biographical...

The University of Jena, officially the Friedrich Schiller University Jena (German: Friedrich-Schiller-Universität Jena, abbreviated FSU, shortened form Uni Jena), is a public research university located in Jena, Thuringia, Germany. The university was established in 1558 and is counted among the ten oldest universities in Germany. It is affiliated with six Nobel Prize winners, most recently in 2000 when Jena graduate Herbert Kroemer won the Nobel Prize for physics. In the 2023 Times Higher Education World University Rankings, the university was awarded 189th place in the world. It was renamed after the poet Friedrich Schiller who was teaching as professor of philosophy when Jena attracted some of the most influential minds at the turn of the 19th century. With Karl Leonhard Reinhold, Johann Gottlieb Fichte, G. W. F. Hegel, F. W. J. Schelling and Friedrich Schlegel on its teaching staff, the university was at the centre of the emergence of German idealism and early Romanticism. As of 2014, the university has around 19,000 students enrolled and 375 professors. Its current president, Walter Rosenthal...