A satellite stops being visible when it moves into the earth's shadow.
Yes, there are currently multiple GPS satellites in orbit that provide positioning, navigation, and timing services globally. The Global Positioning System (GPS) is maintained by the United States and typically consists of around 30 operational satellites, ensuring that at least four satellites are visible from any point on Earth at any time. These satellites transmit signals that allow GPS receivers to calculate precise locations. The system is continuously being updated and improved to enhance accuracy and reliability.
I am not aware of any beacon lights on any satellites. I'm sure the International Space Station has some, for times when the Shuttle is coming in, but what purpose would they serve otherwise? Aircraft have anti-collision lights - to avoid airplanes crashing into each other at night. But satellites generally travel too fast for any visual cues to be useful - and satellites have very limited maneuverability anyway.
Microwaves have a longer wavelength than visible light and are commonly used in cooking, as they are able to penetrate food and cause water molecules to vibrate, generating heat. Microwaves are also used in satellite communication to transmit signals due to their ability to travel through the Earth's atmosphere and interact with satellites in orbit.
Please be a little more precise in your meaning when you say "cover" the Earth. For radio or TV communications, three satellites in geosynchronous orbit will be visible from any inhabitable locale on the planet. (The polar regions aren't really "inhabitable", and aren't visible from GEO. ) For navigational purposes, more are required. The GPS system requires line-of-site to FOUR satellites at one time in order to give a good "fix" of your position; the USAF uses 27 satellites to accomplish this, anywhere on the Earth.
People are not visible from outer space with the naked eye. The International Space Station and some high-resolution satellites are able to capture images of cities and large structures, but individual people cannot be seen.
light emitted by the satellites
A satellite can stop being visible due to factors such as entering the Earth's shadow, changing its orbit, or switching off its reflective surfaces making it harder to see from the ground. Additionally, atmospheric conditions, like clouds or light pollution, can also obstruct visibility of satellites.
When they reflect the light from the sun or moon.
no
One can find pictures of earth satellites on the NASA Visible Earth online website. NASA Visible Earth is a catalog of NASA images of our home planet, earth. The website "Geology" is where one can also find pictures of earth satellites.
Yes, the planets can be described as being satellites of the sun.
Yes, the planets can be described as being satellites of the sun.
Satellites carry cameras (visible light, infrared and ultraviolet)and radar. They produce very good images of the earth that can be studied.
it shows us nothing
Yes, there are currently multiple GPS satellites in orbit that provide positioning, navigation, and timing services globally. The Global Positioning System (GPS) is maintained by the United States and typically consists of around 30 operational satellites, ensuring that at least four satellites are visible from any point on Earth at any time. These satellites transmit signals that allow GPS receivers to calculate precise locations. The system is continuously being updated and improved to enhance accuracy and reliability.
I am not aware of any beacon lights on any satellites. I'm sure the International Space Station has some, for times when the Shuttle is coming in, but what purpose would they serve otherwise? Aircraft have anti-collision lights - to avoid airplanes crashing into each other at night. But satellites generally travel too fast for any visual cues to be useful - and satellites have very limited maneuverability anyway.
Yes, it is possible to see satellites from the ground with the naked eye. Satellites are typically visible during the early morning or evening hours when the sun's light reflects off them. They appear as moving points of light in the night sky.