Mission specialist astronauts work with pilots to maintain spacecraft and equipment, conduct experiments and launch satellites. Mission specialists may be engineers, scientists or physicians. NASA has also introduced mission specialist educator astronauts. Educator astronauts go through the same training as ...
Navigation satellites, like the kind used by your car's GPS, work well at this altitude. Sample specs for such a satellite might be an altitude of miles (20,200 kilometers) and an orbital speed of 8,637 mph (13,900 kph). Finally, it's possible to think about satellites in terms ...
In addition to the ionosphere, satellites can also communicate with each other using a space satellite. These satellites act as mirrors, reflecting signals towards the receiving satellite. They also amplify and re-transmit signals, which can be weakened due to dissipation and absorption in the atmos...
Thousands of satellites fly overhead every day, helping us with things like weather forecasts, scientific research, communications, TV broadcasts (and maybe some surreptitious spying). How much do you know about these eyes in the sky?
Electrons circle the nucleus in fixed orbits -- a simplified way to think about it is to imagine how satellites orbit the Earth. There's a huge amount of theory around electron orbitals, but to understand light there is just one key fact to understand: An electron has a natural orbit that...
Brown, Gary. (2003). How Satellites Work. HowstuffWorks.com. 18 October 2003 . Hillier, Frederick and Gerald, Lieberman. (2001). Intro- duction to Operations Research, Seventh Edition. New York: McGraw Hill, 2001. Intelsat.com - Technical Resources - Satellite Basics. (2003). Intelsat. ...
A notable example of this emerging approach is theStarlink Projectcurrently pursued by the private space exploration and development company SpaceX, which is run byElon Musk. The FCC has given SpaceX permission to launch 12,000 satellites designed to work in tandem to provide high-speed satellite...
Networks of balloons should be far easier and cheaper to unleash in remote places, including in developing nations, than laying wires and putting up cell towers and other expensive equipment, or using extremely expensive communications satellites. Networks of Google balloons could also be used in ...
There are numerous technological ways for countries to spy on each other without ever sending an actual spy to collect information.Satellitesequipped with cameras have been tracking the positions of military units since the 1960s. At first, the satellite would drop a bucket with the film inside ...
However, it isn't all bad news Those that don't need sunlight to make food and energy might survive.We would all get lostIt is very likely that satellites (卫星) wouldn't exist if the Earth were flat, as they would have trouble orbiting a flat planet. It is also hard to imagine a...