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BRRISON
The Balloon Rapid Response for ISON (BRRISON) was a NASA project involving a stratospheric balloon with science instruments intended to study comet C/2012 S1 (ISON) and other celestial objects. Construction The balloon featured an azimuth and attitude stabilized gondola carrying an telescope and two instruments on separate optical benches. The Johns Hopkins University Applied Physics Laboratory contributed the BRRISON Infrared Camera (BIRC) for detecting water and carbon dioxide at . The Southwest Research Institute provided the Ultraviolet-Visible light camera (UVVis) with a fine steering mirror to detect hydroxyl (308 nm) and cyanogen (385 nm) emissions. To save time, both the telescope and gondola avionics were refurbished from JHU/APL's Stratospheric Terahertz Observatory mission. The BRRISON payload was intended to operate at for up to 22 hours. The mission cost , excluding the balloon and NASA personnel expenses, and progressed from concept to launch pad in ten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comet ISON
Comet ISON, formally known as C/2012 S1, was a sungrazing comet from the Oort cloud which was discovered on 21 September 2012 by Vitaly Nevsky (Виталий Невский, Vitebsk, Belarus) and Artyom Novichonok (Артём Новичонок, Kondopoga, Russia). History The discovery was made using the reflecting telescope, reflector of the International Scientific Optical Network (ISON) near Kislovodsk, Russia. Data processing was carried out by automated asteroid-discovery program CoLiTec. Precovery images by the Mount Lemmon Survey from 28 December 2011 and by Pan-STARRS from 28 January 2012 were quickly located. Follow-up observations were made on 22 September 2012 by a team from Remanzacco Observatory in Italy using the iTelescope network. The discovery was announced by the Minor Planet Center on 24 September. Observations by Swift Gamma-Ray Burst Mission, Swift in January 2013 suggested that Comet ISON's comet nucleus, nucleus was around in diameter. Later estimates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High-altitude Balloon
High-altitude balloons are crewed or uncrewed balloons, usually filled with helium or hydrogen, that are released into the stratosphere, generally attaining between above sea level. In 2002, a balloon named BU60-1 reached a record altitude of . The most common type of high-altitude balloons is weather balloons. Other purposes include use as a platform for experiments in the upper atmosphere. Modern balloons generally contain electronic equipment such as radio transmitters, cameras, or satellite navigation systems, such as GPS receivers. These balloons are launched into what is termed "near space", defined as the area of Earth's atmosphere between the Armstrong limit ( above sea level), where pressure falls to the point that a human being cannot survive without a pressurised suit, and the Kármán line ( above sea level), where astrodynamics must take over from aerodynamics in order to maintain flight. Due to the low cost of GPS and communications equipment, high-altitude ballo ... [...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] |
10 Hygiea
Hygiea (minor-planet designation: 10 Hygiea) is a major asteroid and possible dwarf planet located in the main asteroid belt. With a diameter of and a mass estimated to be 3% of the total mass of the belt, it is the fourth-largest asteroid in the Solar System by both volume and mass. In some spectral classifications it is the largest of the dark C-type asteroids with a carbonaceous surface, whereas in others it is second after 1 Ceres. Observations taken with the Very Large Telescope's SPHERE imager in 2017 and 2018, and announced in late 2019, revealed that Hygiea is nearly spherical and is close to a hydrostatic equilibrium shape. The authors of the study therefore consider it a possible dwarf planet. However, Hygiea is conjectured to have been disrupted by an impact, with the subsequent debris reaccumulating, rather than being massive enough to be plastic. The disruptive impact produced the largest known collisional family. Observation Despite its size, Hygiea appears very ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA Programs
This is a list of NASA missions, both crewed and robotic, since the establishment of NASA in 1958. There are over 80 currently active science missions. X-Plane program Since 1945, NACA (NASA's predecessor) and, since 1958, NASA have conducted the X-Plane Program. The program was originally intended to create a family of experimental aircraft not intended for production beyond the limited number of each design built solely for flight research. The first X-Plane, the Bell X-1, was the first rocket-powered airplane to break the sound barrier on October 14, 1947. X-Planes have set numerous milestones since then, both crewed and unpiloted. Human spaceflight NASA has successfully launched 166 crewed flights. Three have ended in failure, causing the deaths of seventeen crewmembers in total: Apollo 1 (which never launched) killed three crew members in 1967, STS-51-L ( the ''Challenger'' disaster) killed seven in 1986, and STS-107 ( the ''Columbia'' disaster) killed seven more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Maryland
The University of Maryland, College Park (University of Maryland, UMD, or simply Maryland) is a public land-grant research university in College Park, Maryland. Founded in 1856, UMD is the flagship institution of the University System of Maryland. It is also the largest university in both the state and the Washington metropolitan area, with more than 41,000 students representing all fifty states and 123 countries, and a global alumni network of over 388,000. Together, its 12 schools and colleges offer over 200 degree-granting programs, including 92 undergraduate majors, 107 master's programs, and 83 doctoral programs. UMD is a member of the Association of American Universities and competes in intercollegiate athletics as a member of the Big Ten Conference. The University of Maryland's proximity to the nation's capital has resulted in many research partnerships with the federal government; faculty receive research funding and institutional support from many agencies, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spur, Texas
Spur is a city in Dickens County, Texas, United States. The population was 1,318 at the 2010 census, up from 1,088 at the 2000 census. A city council resolution passed July 2014 proclaimed Spur the "nation's first tiny house-friendly town." On October 9, 2009, Spur celebrated its centennial with the dedication of a monumental sculpture of a spur, created by local welder John Grusendorf. The event, sponsored by the Dickens County Historical Commission, was held at Dyess Park off Texas State Highway 70. On March 28, 2017, three storm chasers died when one of them, Kelley Williamson of Cassville, Missouri, drove through a stop sign at high speed and struck a car driven by Corbin Jaeger from Peoria, Arizona. Both men were killed, along with Randy Yarnell, a passenger in Williamson's car. Geography Spur is located in southern Dickens County at (33.477650, –100.857018). Texas Highway 70 passes through the city, leading north to Dickens, the county seat, and southeast to Jayto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Daylight Time
The Mountain Time Zone of North America keeps time by subtracting seven hours from Coordinated Universal Time (UTC) when standard time ( UTC−07:00) is in effect, and by subtracting six hours during daylight saving time ( UTC−06:00). The clock time in this zone is based on the mean solar time at the 105th meridian west of the Greenwich Observatory. In the United States, the exact specification for the location of time zones and the dividing lines between zones is set forth in the Code of Federal Regulations at 49 CFR 71. In the United States and Canada, this time zone is generically called Mountain Time (MT). Specifically, it is Mountain Standard Time (MST) when observing standard time, and Mountain Daylight Time (MDT) when observing daylight saving time. The term refers to the Rocky Mountains, which range from British Columbia to New Mexico. In Mexico, this time zone is known as the or ("Pacific Zone"). In the US and Canada, the Mountain Time Zone is to the east of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fort Sumner, New Mexico
Fort Sumner is a village in and the county seat of De Baca County, New Mexico, United States. The population was 1,031 at the 2010 U.S. Census, down from the figure of 1,249 recorded in 2000. Fort Sumner is the spring and fall home of the Columbia Scientific Balloon Facility, and is home to the burial site of famed outlaw of the American West, Billy the Kid, who was shot and killed there in 1881. History Named after former New Mexico Territory military governor Edwin Vose Sumner, U.S. Fort Sumner was a military fort charged with the internment of nearby Navajo and Mescalero Apache populations from 1863 to 1868. The federal government closed the fort in 1868 and sold its buildings to Lucien Maxwell, a prominent New Mexico landowner, in 1870. In the latter 1870s Maxwell's son Pete befriended legendary outlaw Billy the Kid, and it was in his house that Billy was killed by Pat Garrett. Billy the Kid is buried in the old military cemetery in Fort Sumner, as is Lucien Maxwell. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbia Scientific Balloon Facility
The Columbia Scientific Balloon Facility (CSBF) (established in 1961, formerly known as the National Scientific Balloon Facility (NSBF)) is a NASA facility responsible for providing launch, tracking and control, airspace coordination, telemetry and command systems, and recovery services for unmanned high-altitude balloons. Customers of the CSBF include NASA centers, universities, and scientific groups from all over the world. Mission CSBF has a threefold mission: * Provide maintenance, operations and logistics support for NASA's scientific balloon program and facilities. * Provide sophisticated ground and flight systems for launch, control, data retrieval, commanding, and recovery of NASA's balloon missions. * Perform research and development to advance the capabilities of NASA's suborbital programs. History The Balloon Facility was established by Vincent E. Lally at NCAR in Boulder, Colorado in 1961 under the auspices of the National Science Foundation. It was moved to Palestin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbulence
In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity. It is in contrast to a laminar flow, which occurs when a fluid flows in parallel layers, with no disruption between those layers. Turbulence is commonly observed in everyday phenomena such as surf, fast flowing rivers, billowing storm clouds, or smoke from a chimney, and most fluid flows occurring in nature or created in engineering applications are turbulent. Turbulence is caused by excessive kinetic energy in parts of a fluid flow, which overcomes the damping effect of the fluid's viscosity. For this reason turbulence is commonly realized in low viscosity fluids. In general terms, in turbulent flow, unsteady vortices appear of many sizes which interact with each other, consequently drag due to friction effects increases. This increases the energy needed to pump fluid through a pipe. The onset of turbulence can be predicted by the dimensionless Rey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emission Spectrum
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an electron making a atomic electron transition, transition from a high energy state to a lower energy state. The photon energy of the emitted photon is equal to the energy difference between the two states. There are many possible electron transitions for each atom, and each transition has a specific energy difference. This collection of different transitions, leading to different radiated wavelengths, make up an emission spectrum. Each element's emission spectrum is unique. Therefore, spectroscopy can be used to identify elements in matter of unknown composition. Similarly, the emission spectra of molecules can be used in chemical analysis of substances. Emission In physics, emission is the process by which a higher energy quantum mechanical state of a particle becomes converted to a lower one through the emission of a photon, resulting in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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