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SA-2 (Apollo)
Saturn-Apollo 2 (SA-2) was the second flight of the Saturn I launch vehicle, the first flight of Project Highwater, and was part of the American Apollo program. The rocket was launched on April 25, 1962, from Cape Canaveral, Florida. History Launch preparation for the mission began at Cape Canaveral on February 27, 1962, with the arrival of the second Saturn I launch vehicle. The only significant change made to the vehicle from the previous SA-1 flight was the addition of extra baffles in the propellant tanks to mitigate fuel sloshing. While no serious delays were encountered, there were several minor problems reported. A leak was detected between the liquid oxygen dome and injector for the #4 H-1 rocket engine; while attempts were made to fix the problem, it was eventually decided to launch without replacing the engine. Minor problems were found in the guidance subsystem and service structure operations, damaged strain gauges were found in a liquid oxygen stud and truss me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA
The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeeding the National Advisory Committee for Aeronautics (NACA), to give the U.S. space development effort a distinctly civilian orientation, emphasizing peaceful applications in space science. NASA has since led most American space exploration, including Project Mercury, Project Gemini, the 1968-1972 Apollo Moon landing missions, the Skylab space station, and the Space Shuttle. NASA supports the International Space Station and oversees the development of the Orion spacecraft and the Space Launch System for the crewed lunar Artemis program, Commercial Crew spacecraft, and the planned Lunar Gateway space station. The agency is also responsible for the Launch Services Program, which provides oversight of launch operations and countdown management f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charleston, South Carolina
Charleston is the largest city in the U.S. state of South Carolina, the county seat of Charleston County, and the principal city in the Charleston–North Charleston metropolitan area. The city lies just south of the geographical midpoint of South Carolina's coastline on Charleston Harbor, an inlet of the Atlantic Ocean formed by the confluence of the Ashley, Cooper, and Wando rivers. Charleston had a population of 150,277 at the 2020 census. The 2020 population of the Charleston metropolitan area, comprising Berkeley, Charleston, and Dorchester counties, was 799,636 residents, the third-largest in the state and the 74th-largest metropolitan statistical area in the United States. Charleston was founded in 1670 as Charles Town, honoring King CharlesII, at Albemarle Point on the west bank of the Ashley River (now Charles Towne Landing) but relocated in 1680 to its present site, which became the fifth-largest city in North America within ten years. It remained unincorpor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The News And Courier
''The Post and Courier'' is the main daily newspaper in Charleston, South Carolina. It traces its ancestry to three newspapers, the ''Charleston Courier'', founded in 1803, the ''Charleston Daily News'', founded 1865, and ''The Evening Post'', founded 1894. Through the ''Courier'', it brands itself as the oldest daily newspaper in the South and one of the oldest continuously operating newspapers in the United States. It is the flagship newspaper of Evening Post Industries, which in turn is owned by the Manigault family of Charleston, descendants of Peter Manigault. It is the largest newspaper in South Carolina, followed by Columbia's ''The State'' and ''The Greenville News''. History The ''Charleston Courier,'' founded in 1803. The founder of the ''Courier'', Aaron Smith Willington, came from Massachusetts with newspaper experience. In the early 19th century, he was known to row out to meet ships from London, Liverpool, Havre, and New York City to get the news earlier th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nashua, New Hampshire
Nashua is a city in southern New Hampshire, United States. At the 2020 United States census, 2020 census, it had a population of 91,322, the second-largest in northern New England after nearby Manchester, New Hampshire, Manchester. Along with Manchester, it is a county seat, seat of New Hampshire's most populous county, Hillsborough County, New Hampshire, Hillsborough. Built around the now-departed textile industry, in recent decades Nashua's economy has shifted to the financial services, high tech, and arms industry, defense industries as part of the Massachusetts Miracle, economic recovery that started in the 1980s in the Greater Boston region. Major private employers in the city include Nashua Corporation, BAE Systems, and Teradyne. The city also hosts two major regional medical centers, Southern New Hampshire Health System, Southern New Hampshire Medical Center and St. Joseph Hospital (Nashua, New Hampshire), St. Joseph Hospital. The South Nashua commercial district is a major ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nashua Telegraph
''The Telegraph'', for most of its existence known as the ''Nashua Telegraph'', is a daily newspaper in Nashua, New Hampshire. It was founded as the ''Nashua Daily Telegraph'' in 1869, although a weekly version dates back to 1832. Through the 2000s it was the second-largest newspaper in the state in terms of daily print circulation, behind the ''New Hampshire Union Leader'' of Manchester. In 2020 ''The Telegraph'' reduced its print run to Saturday only, when it produces a weekend edition under the ''Sunday Telegraph'' banner. In the announcement, the paper said it will continue to report news for its website every day. After being family-owned for a century, ''The Telegraph'' was bought in the 1980s by Independent Publications of Bryn Mawr, Pennsylvania, which owned several smaller daily and weekly newspapers around the United States as well as some other businesses. In 2005, the paper's owner bought the Cabinet Press, publisher of weekly newspapers based in nearby Milford, New ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wernher Von Braun
Wernher Magnus Maximilian Freiherr von Braun ( , ; 23 March 191216 June 1977) was a German and American aerospace engineer and space architect. He was a member of the Nazi Party and Allgemeine SS, as well as the leading figure in the development of rocket technology in Nazi Germany and later a pioneer of rocket and space technology in the United States. As a young man, von Braun worked in Nazi Germany's rocket development program. He helped design and co-developed the V-2 rocket at Peenemünde during World War II. Following the war, he was secretly moved to the United States, along with about 1,600 other German scientists, engineers, and technicians, as part of Operation Paperclip. He worked for the United States Army on an intermediate-range ballistic missile program, and he developed the rockets that launched the United States' first space satellite Explorer 1 in 1958. He worked with Walt Disney on a series of films, which popularized the idea of human space travel in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Primacord
Primacord is a brand of detonating cord used in blasting. The registered trademark Primacord was originally owned by the Ensign-Bickford Company; Ensign-Bickford sold the trademark to Dyno Nobel in 2003, who manufacture it in their Graham, Kentucky factory. The name is also used as a genericized trademark for any detonating cord. Description Primacord consists of a continuous core of PETN, RDX or other high explosive, bound by textile yarns and finished with plastic and wax as waterproofing agents. It is produced in eight strengths: Primaline is a related product differing principally in having a plastic jacket instead of textile. Primaline is also available in higher loadings, up to 85 g/m (400 gr/ft): {, class="wikitable" ! Name !! Loading g/ m ( gr/ ft) !! Colour , - , Primaline 4D , , 3.6 (18) , , Orange , - , Primaline 4HS , , 3.6 (18) , , Clear with blue stripe , - , Primaline 5 , , 5.3 (25) , , Orange with wax coating , - , Primaline 5D , , 5.3 (25) , , O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Noctilucent Cloud
Noctilucent clouds, or night shining clouds, are tenuous cloud-like phenomena in the upper atmosphere of Earth. When viewed from space, they are called polar mesospheric clouds (PMCs), detectable as a diffuse scattering layer of water ice crystals near the summer polar mesopause. They consist of ice crystals and from the ground are only visible during astronomical twilight. ''Noctilucent'' roughly means "night shining" in Latin. They are most often observed during the summer months from latitudes between ±50° and ±70°. Too faint to be seen in daylight, they are visible only when the observer and the lower layers of the atmosphere are in Earth's shadow, but while these very high clouds are still in sunlight. Recent studies suggest that increased atmospheric methane emissions produce additional water vapor once the methane molecules reach the mesosphere – creating, or reinforcing existing noctilucent clouds. They are the highest clouds in Earth's atmosphere, located in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ionosphere
The ionosphere () is the ionized part of the upper atmosphere of Earth, from about to above sea level, a region that includes the thermosphere and parts of the mesosphere and exosphere. The ionosphere is ionized by solar radiation. It plays an important role in atmospheric electricity and forms the inner edge of the magnetosphere. It has practical importance because, among other functions, it influences radio propagation to distant places on Earth. History of discovery As early as 1839, the German mathematician and physicist Carl Friedrich Gauss postulated that an electrically conducting region of the atmosphere could account for observed variations of Earth's magnetic field. Sixty years later, Guglielmo Marconi received the first trans-Atlantic radio signal on December 12, 1901, in St. John's, Newfoundland (now in Canada) using a kite-supported antenna for reception. The transmitting station in Poldhu, Cornwall, used a spark-gap transmitter to produce a signal with a freq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saturn SA2 Launch
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine and a half times that of Earth. It has only one-eighth the average density of Earth; however, with its larger volume, Saturn is over 95 times more massive. Saturn's interior is most likely composed of a core of iron–nickel and rock (silicon and oxygen compounds). Its core is surrounded by a deep layer of metallic hydrogen, an intermediate layer of liquid hydrogen and liquid helium, and finally, a gaseous outer layer. Saturn has a pale yellow hue due to ammonia crystals in its upper atmosphere. An electrical current within the metallic hydrogen layer is thought to give rise to Saturn's planetary magnetic field, which is weaker than Earth's, but which has a magnetic moment 580 times that of Earth due to Saturn's larger size. Saturn's magnetic field strength is around one-twentieth of Jupiter's. The outer atmosphere is gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
