Machine learning & AI
A fire in Central Park seems to appear as a smoke plume and a line of flames in a satellite image. Colorful lights on Diwali night in India, seen from space, seem to show widespread fireworks activity.
Apr 21, 2021
0
84
Internet
Microsoft Corporation has announced on its website the development of a portable data center that can be used to bring cloud computing to remote environments. In their announcement, Microsoft describes their Azure Modular ...
Energy & Green Tech
EPFL researchers have built a pilot-scale solar reactor that produces usable heat and oxygen, in addition to generating hydrogen with unprecedented efficiency for its size.
Apr 17, 2023
0
1668
Telecom
Amazon.com is one step closer to space.
Jul 31, 2020
0
110
Telecom
Birmingham scientists have revealed a new beam-steering antenna that increases the efficiency of data transmission for 'beyond 5G'—and opens up a range of frequencies for mobile communications that are inaccessible to currently ...
Jun 3, 2022
0
116
Engineering
The US military has now shot down four high-altitude objects that had entered American and Canadian airspace, raising questions about their purpose and origin.
Feb 15, 2023
0
31
Engineering
Automotive
Today's world is one big maze, connected by layers of concrete and asphalt that afford us the luxury of navigation by vehicle. For many of our road-related advancements—GPS lets us fire fewer neurons thanks to map apps, ...
Oct 13, 2021
0
113
Consumer & Gadgets
A drone has set an endurance record that has made headlines. Specifically, The Engineer and other sites reported it was in the air for 25 days, 23 hours and 57 minutes. The UK-built pilotless drone took off from Arizona ...
Telecom
Though satellite internet has existed for years, the competition is about to rapidly intensify, with companies planning to launch thousands of their own systems into low Earth orbit.
Apr 7, 2022
0
118
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
