Scientists have found a way to make GPS remarkably accurate in city “urban canyons,” where…
Browsing: Satellites
Satellites are objects, either man-made or natural, that orbit larger bodies in space. Natural satellites, like Earth’s Moon, have existed naturally. However, artificial satellites are human-made objects launched into space to serve various functions, including communications, weather monitoring, navigation, scientific research, and Earth observation. Since the launch of the first artificial satellite, Sputnik, by the Soviet Union in 1957, thousands of satellites have been launched by governments and private enterprises around the world. These satellites play a crucial role in our daily lives, enabling global communications, television broadcasting, weather forecasting, disaster management, and GPS systems. They orbit at various altitudes and trajectories, from a few hundred kilometers above Earth in low Earth orbit to geostationary orbits 35,786 kilometers above the Equator, where they rotate synchronously with the Earth’s rotation.
NASA just demonstrated a technology that lets spacecraft communicate across multiple networks, paving the way…
A new study warns that if satellite operators suddenly lose control during a major disruption,…
Satellite observations reveal that global nighttime lighting is steadily rising, though the trend varies widely…
A new study finds that bridges in North America and Africa face the highest risk…
Earthquake sensors are giving scientists a new way to track space junk as it falls…
A new analysis suggests modern satellite networks could suffer catastrophic collisions within days of losing…
Long-term satellite measurements show that Earth’s magnetic field is changing faster and more unevenly than…
A new study demonstrates that transmitting quantum signals from Earth to a satellite is achievable,…
Two spacecraft mimicked a solar eclipse to capture rare images of the Sun’s corona. The…
A novel LEO constellation design uses grouped satellites and swarm optimization to achieve precise Earth…
GOES-19 has taken over as NOAA’s primary geostationary eye in the Western Hemisphere, joining GOES‑18…
PERSEI Space, a startup supported by the European Space Agency and UC3M, is developing a…
Greenhouse gases are doing more than warming our planet — they’re reshaping space itself. As…
Climate change isn’t just warming the planet—it’s reshaping space. As greenhouse gases trap heat in…
A new approach is unlocking hidden data from satellite mega-constellations to track Earth’s changes in…
To make space servicing safer and more efficient, researchers created a fuel-efficient, collision-free trajectory optimization…
In a pioneering space mission, the Japanese Aerospace Exploration Agency (JAXA) launched LignoSat, a satellite…