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Sundancer (other)
''Sundancer'' was the proposed third prototype space habitat intended to be launched by Bigelow Aerospace—and the first human-rated expandable module based on TransHab technology acquired from NASA. It was to have been used to test and confirm systems used in the company's commercial space station efforts during the early 2010s, and if successful, would have formed the first piece of the proposed commercial space station. While ''Sundancer'' had been under construction at the Bigelow plant in North Las Vegas, Nevada, the company announced in July 2011 that ''Sundancer'' had been removed from their station evolution path, and that the B330 would become the first production module. Spacecraft history and future Upon its original announcement, ''Sundancer'' was intended to be the fourth module orbited by Bigelow Aerospace. In August 2007, however, it was announced that due to rising space launch costs and the level of success of the first two Bigelow modules launched, the third d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Degree (angle)
A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane (mathematics), plane angle in which one Turn (geometry), full rotation is 360 degrees. It is not an SI unit—the SI unit of angular measure is the radian—but it is mentioned in the SI Brochure, SI brochure as an Non-SI units mentioned in the SI, accepted unit. Because a full rotation equals 2 radians, one degree is equivalent to radians. History The original motivation for choosing the degree as a unit of rotations and angles is unknown. One theory states that it is related to the fact that 360 is approximately the number of days in a year. Ancient astronomers noticed that the sun, which follows through the ecliptic path over the course of the year, seems to advance in its path by approximately one degree each day. Some ancient calendars, such as the Iranian calendar, Persian calendar and the Babylonian calendar, used 360 days for a year. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Low Impact Docking System
The NASA Docking System (NDS) is a spacecraft docking and berthing mechanism used on the International Space Station (ISS), the Orion spacecraft, and the Starliner. The NDS is NASA's implementation of the International Docking System Standard (IDSS), an international spacecraft docking standard promulgated by the International Space Station Multilateral Coordination Board. The international Low Impact Docking System (iLIDS) is the precursor to the NDS. NDS Block 1 was designed and built by The Boeing Company in Houston, TX, to meet the IDSS standards. Design qualification testing took place through January 2017. Using NDS, NASA developed the International Docking Adapter (IDA) to provide two IDSS-compliant docking ports on the ISS. The IDAs were delivered to the ISS starting in 2016. Each of two existing Pressurized Mating Adapters has an IDA permanently attached, so the former PMA function is no longer available for visiting spacecraft. Since 2019, visiting spacecraft dock to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Materiel
Materiel (; ) refers to supplies, equipment, and weapons in military supply-chain management, and typically supplies and equipment in a commercial supply chain context. In a military context, the term ''materiel'' refers either to the specific needs (excluding manpower) of a force to complete a specific mission, or the general sense of the needs (excluding manpower) of a functioning army. An important category of materiel is commonly referred to as ordnance, especially concerning mounted guns (artillery) and the shells it consumes. Along with fuel, and munitions in general, the steady supply of ordnance is an ongoing logistic challenge in active combat zones. Materiel management consists of continuing actions relating to planning, organizing, directing, coordinating, controlling, and evaluating the application of resources to ensure the effective and economical support of military forces. It includes provisioning, cataloging, requirements determination, acquisition, distrib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlas V
Atlas V is an expendable launch system and the fifth major version in the Atlas (rocket family), Atlas launch vehicle family. It was originally designed by Lockheed Martin, now being operated by United Launch Alliance (ULA), a joint venture between Lockheed Martin and Boeing. Atlas V is also a major NASA launch vehicle. It is America's longest-serving active rocket. In August 2021, ULA announced that Atlas V would be retired, and all 29 remaining launches had been sold. , 19 launches remain. Each Atlas V launch vehicle consists of two main stages. The first stage (rocketry), first stage is powered by a Russian RD-180 engine manufactured by NPO Energomash, Energomash and burning kerosene and liquid oxygen. The Centaur (rocket stage), Centaur upper stage is powered by one or two American RL10 engine(s) manufactured by Aerojet Rocketdyne and burns liquid hydrogen and liquid oxygen. The Star 48 upper stage was used on the ''New Horizons'' mission as a third stage. strap-on booster, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lockheed Martin
The Lockheed Martin Corporation is an American aerospace, arms, defense, information security, and technology corporation with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta in March 1995. It is headquartered in North Bethesda, Maryland, in the Washington, D.C. area. Lockheed Martin employs approximately 115,000 employees worldwide, including about 60,000 engineers and scientists as of January 2022. Lockheed Martin is one of the largest companies in the aerospace, military support, security, and technologies industry. It is the world's largest defense contractor by revenue for fiscal year 2014.POC Top 20 Defence Contractors of 2014 . Retrieved: July 2015 In 2013, 78% of Lockheed Martin's revenues came from military sales; [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medium-lift Launch Vehicle
A medium-lift launch vehicle (MLV) is a rocket launch vehicle that is capable of lifting between by NASA classification or between by Russian classification of payload into low Earth orbit (LEO).50t payloads" An MLV is between small-lift launch vehicles and heavy-lift launch vehicles. Rated launch vehicles Operational Under development Retired Gallery File:Atlas-B ICBM.jpg, Launch of an Atlas B intercontinental ballistic missile File:Launch of Friendship 7 - GPN-2000-000686.jpg, Launch of the first American crewed orbital space flight Atlas and Friendship 7 File:SpX CRS-2 launch - further - cropped.jpg, A Falcon 9 v1.0 launches with an uncrewed Dragon spacecraft, 2012 File:SpaceX factory Falcon 9 booster tank.jpg, Falcon 9 booster tank at the SpaceX factory, 2008 File:02 Launch of GSLV Mk III D2 with GSAT-29 from Second Launch Pad of Satish Dhawan Space Centre, Sriharikota (SDSC SHAR).jpg, Launch of GSLV Mk lll D2 with GSAT-29 from SHAR, India. See also * Soun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genesis II (space Habitat)
''Genesis II'' is the second experimental space habitat designed and built by the private American firm Bigelow Aerospace, launched in 2007. As the second module sent into orbit by the company, this spacecraft builds on the data and experience gleaned from its previously orbited sister-ship ''Genesis I''. Like its sister-ship and other modules being designed by Bigelow Aerospace, this spacecraft is based on the NASA TransHab design, which provides increased interior volume and reduced launch diameter along with potentially reduced mass compared to traditional rigid structures. ''Genesis II'' was "retired" when its avionics systems stopped working after two and a half years, thus becoming a derelict spacecraft. , the spacecraft remains in orbit. Spacecraft history Similar to the process endured by Bigelow for ''Genesis I'', transporting ''Genesis II'' to Russia for launch was the end result of nearly a year of regulatory processes due to restrictions imposed by Internation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynetics
Dynetics is an American applied science and information technology company headquartered in Huntsville, Alabama. Its primary customers are the United States Department of Defense (DoD), the United States Intelligence Community, and National Aeronautics and Space Administration (NASA). History Herschel Matheny and Dr. Steve Gilbert founded Dynetics in 1974. During the 1980s, Dynetics expanded to include electro-optic and infrared sensors, missile systems analysis and design, software development, modeling and simulation, and foreign material exploitation of radars, missiles, and missile seekers. In the 1990s, Dynetics continued to grow its core business and expanded into the automotive supply industry as a provider of electrical test systems. Since 2000, Dynetics has been selling information technology (IT) and cybersecurity services, including winning a contract to provide IT services to NASA's Marshall Space Flight Center (MSFC). The company entered the space business with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andrews Space
Andrews Space was founded in 1999 by Jason Andrews and Marian Joh to be a catalyst in the commercialization, exploration and development of space. Originally named Andrews Space & Technology, the company shortened its name in 2003 to Andrews Space. Over its life the company developed many unique technologies and space transportation architectures for the US Government (NASA, DARPA, others) and commercial customers. The company is now Spaceflight Systems, a subsidiary of Spaceflight Industries, Inc. Projects and products Andrews Space developed a number of innovative technologies and space transportation concepts including: * Mini-mag Orion * Alchemist Air Collection and Enrichment System * Gryphon fully reusable horizontal take / horizontal landing space plane * Peregrine small launch system * SHERPA space tug * Cubesat/Nanosat recovery system Andrews Space worked for most branches of the US Government. Noteworthy efforts include: * NASA Space Launch Initiative * NASA Space Tran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypergolic Propellant
A hypergolic propellant is a rocket propellant combination used in a rocket engine, whose components spontaneously ignite when they come into contact with each other. The two propellant components usually consist of a fuel and an oxidizer. The main advantages of hypergolic propellants are that they can be stored as liquids at room temperature and that engines which are powered by them are easy to ignite reliably and repeatedly. Common hypergolic propellants are difficult to handle due to their extreme toxicity and/or corrosiveness. In contemporary usage, the terms "hypergol" and "hypergolic propellant" usually mean the most common such propellant combination: dinitrogen tetroxide plus hydrazine and/or its relatives monomethylhydrazine (MMH) and unsymmetrical dimethylhydrazine (UDMH). History In 1935, Hellmuth Walter discovered that hydrazine hydrate was hypergolic with high-test peroxide of 80-83%. He was probably the first to discover this phenomenon, and set to work d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerojet
Aerojet was an American rocket and missile propulsion manufacturer based primarily in Rancho Cordova, California, with divisions in Redmond, Washington, Orange and Gainesville in Virginia, and Camden, Arkansas. Aerojet was owned by GenCorp. In 2013, Aerojet was merged by GenCorp with the former Pratt & Whitney Rocketdyne to form Aerojet Rocketdyne. History Aerojet developed from a 1936 meeting hosted by Theodore von Kármán at his home. Joining von Kármán, who was at the time director of Guggenheim Aeronautical Laboratory at the California Institute of Technology, were a number of Caltech professors and students, including rocket scientist and astrophysicist Fritz Zwicky and explosives expert Jack Parsons, all of whom were interested in the topic of spaceflight. The group continued to occasionally meet, but its activities were limited to discussions rather than experimentation. Their first design was tested on August 16, 1941, consisting of a small cylindrical solid-fuel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbital Maneuver
In spaceflight, an orbital maneuver (otherwise known as a burn) is the use of propulsion systems to change the orbit of a spacecraft. For spacecraft far from Earth (for example those in orbits around the Sun) an orbital maneuver is called a ''deep-space maneuver (DSM)''. The rest of the flight, especially in a transfer orbit, is called ''coasting''. General Rocket equation The Tsiolkovsky rocket equation, or ideal rocket equation is an equation that is useful for considering vehicles that follow the basic principle of a rocket: where a device that can apply acceleration to itself (a thrust) by expelling part of its mass with high speed and moving due to the conservation of momentum. Specifically, it is a mathematical equation that relates the delta-v (the maximum change of speed of the rocket if no other external forces act) with the effective exhaust velocity and the initial and final mass of a rocket (or other reaction engine.) For any such maneuver (or journey involvin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
