News tagged with satellite
Firefly protein lights up degenerating muscles, aiding muscular-dystrophy research
Stanford University School of Medicine scientists have created a mouse model of muscular dystrophy in which degenerating muscle tissue gives off visible light. The observed luminescence occurs only in damaged muscle tissue ...
Medical research
Apr 24, 2013 |
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Rainfall, brain infection linked in sub-Saharan Africa
(Medical Xpress)—The amount of rainfall affects the number of infant infections leading to hydrocephalus in Uganda, according to a team of researchers who are the first to demonstrate that these brain infections ...
Diseases, Conditions, Syndromes
Jan 04, 2013 |
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Satellite telephones and navigation improving healthcare response in Haiti
Earthquakes, tsunamis and hurricanes have taken their toll on many parts of the world. Communities struggle for years to rebuild without immediate access to basic necessities like proper healthcare. Satellites ...
Health
Oct 24, 2012 |
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Researchers solve key part of old mystery in generating muscle mass
Working with mice, Johns Hopkins researchers have solved a key part of a muscle regeneration mystery plaguing scientists for years, adding strong support to the theory that muscle mass can be built without ...
Medical research
Sep 27, 2012 |
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At the right place at the right time—new insights into muscle stem cells
Muscles have a pool of stem cells which provides a source for muscle growth and for regeneration of injured muscles. The stem cells must reside in special niches of the muscle for efficient growth and repair.
Medical research
Sep 17, 2012 |
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Possible muscle disease therapeutic target found
The study of muscular system protein myostatin has been of great interest to researchers as a potential therapeutic target for people with muscular disorders. Although much is known about how myostatin affects muscle growth, ...
Medical research
Aug 06, 2012 |
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Long-term exposure to air pollution increases risk of hospitalization for lung, heart disease
Older adults may be at increased risk of being hospitalized for lung and heart disease, stroke, and diabetes following long-term exposure to fine-particle air pollution, according to a new study by researchers at Harvard ...
Health
Apr 17, 2012 |
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Nighttime images help track disease from the sky
(Medical Xpress) -- Normally used to spot where people live, satellite images of nighttime lights can help keep tabs on the diseases festering among them, too, according to new research.
Diseases, Conditions, Syndromes
Dec 08, 2011 |
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Adult stem cells use special pathways to repair damaged muscle (w/ Video)
When a muscle is damaged, dormant adult stem cells called satellite cells are signaled to "wake up" and contribute to repairing the muscle. University of Missouri researchers recently found how even distant satellite cells ...
Medical research
Dec 01, 2011 |
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Using satellite data to decode disease origins
Uncovering the origin of illness is like finding a needle in a haystack, but that search is getting easier with the help of powerful tools like genetic analysis and satellite data.
Diseases, Conditions, Syndromes
Nov 03, 2011 |
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Media habits of young people may make them drink more -- what should be done?
Media companies are increasingly targeting adolescents with TV shows that feature violence, alcohol and drugs. An interdisciplinary research project with researchers from the University of Gothenburg, Sweden, and colleagues ...
Health
Oct 11, 2011 |
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Satellite
In the context of spaceflight, a satellite is an object which has been placed into orbit by human endeavor. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon.
The first artificial satellite, Sputnik 1, was launched by the Soviet Union in 1957. By 2009 thousands of satellites have been launched into orbit around the Earth. These originate from more than 50 countries and have used the satellite launching capabilities of ten nations. A few hundred satellites are currently operational, whereas thousands of unused satellites and satellite fragments orbit the Earth as space debris. A few space probes have been placed into orbit around other bodies and become artificial satellites to the Moon, Venus, Mars, Jupiter and Saturn.
Satellites are used for a large number of purposes. Common types include military (spy) and civilian Earth observation satellites, communication satellites, navigation satellites, weather satellites, and research satellites. Space stations and human spacecraft in orbit are also satellites. Satellite orbits vary greatly, depending on the purpose of the satellite, and are classified in a number of ways. Well-known (overlapping) classes include low Earth orbit, polar orbit, and geostationary orbit.
Satellites are usually semi-independent computer controlled systems. Satellite subsystems attend many tasks, such as power generation, thermal control, telemetry, attitude control and orbit control.
For more information about Satellite, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
