As pandemic lockdowns forced humans into isolation, Earth's vegetation was thriving. The year 2020 was the greenest in modern satellite records from 2001 to 2020, according to a recent study published in Remote Sensing of ...
Earth Sciences
15 hours ago
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Land topography is usually formed gradually over long periods of time, but sometimes a single event can dramatically change things. On New Year's Day in 2024, a devastating earthquake in the Noto Peninsula upended the region.
Earth Sciences
Feb 5, 2025
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25
New, groundbreaking research shows how, at a local scale, agricultural research and development led to improved crop varieties that resulted in global benefits to the environment and food system sustainability. The Purdue ...
Ecology
Feb 4, 2025
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56
A list of the top 10 global regions where natural or anthropogenic sources emit methane on a continuous, "persistent" basis was recently published in Atmospheric Chemistry and Physics.
Environment
Feb 3, 2025
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181
Burkina Faso is a west African dryland country known for its diverse ecosystems, including savannas, forests and wetlands. Large herbivores like elephants, giraffes and hippopotamuses, and predators like lions, leopards and ...
Ecology
Feb 3, 2025
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Meteoroid impacts create seismic waves that cause Mars to shake more strongly and deeply than previously thought. This is shown by an investigation using artificial intelligence carried out by an international research team ...
Planetary Sciences
Feb 3, 2025
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4
The Greenland Ice Sheet is cracking open more rapidly as it responds to climate change. The warning comes in a new large-scale study of crevasses on the world's second largest body of ice.
Earth Sciences
Feb 3, 2025
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63
Japan's space agency said on Sunday it successfully launched a navigation satellite on its new flagship H3 rocket as the country seeks to have a more precise location positioning system of its own.
Space Exploration
Feb 3, 2025
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4
Deforestation in Indonesia rose in 2024 for a third year running, a local environmental NGO said Friday based on satellite image analysis and fieldwork.
Environment
Jan 31, 2025
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1
A study led by researchers from the University of Virginia has used satellite measurements to show the long-term persistence of air pollution inequalities tied to industrialized swine facilities in Eastern North Carolina.
Environment
Jan 28, 2025
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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.
This text uses material from Wikipedia, licensed under CC BY-SA
