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If a satellite hits any other objects its orbit decays and falls back to the earth. The atmosphere extends (although it does get VERY thin) hundreds of miles above the surface of our planet. The few molecules of gas at satellite orbit altitudes ARE enough to slow a satellite down and cause it to fall to the ground.
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What were Echo 1 and Telstar 1?
Communications satellites, launched in the 1960's. There were 2 Echo satellites, which were passive (the signal would bounce back to earth like a mirror). The Telstar satellites were active, meaning that the signal was retransmitted back to earth.
What happens to old satellites?
Old satellites orbiting near the Earth eventually fall back into the atmosphere and burn. Satellites orbiting farther away stay in orbit indefinitely.
Why do all satellites face south?
This allows them to see the entire surface of the Earth. The Earth is rotating East to West. (Or West to East if you were the satellite.) If you placed a satellite into an East-West orbit, it would not see the polar regions. If it were high enough (geo-stationary), it would only see one spot on the Earth. By using North-South (polar) orbits, the satellites will, after several orbits, be able to see the entire surface of the Earth.
Why is it important for satellites to be outside the earths atmosphere?
Satellites need to be out of the earth's atmosphere or the gravity would make them fall to the ground. In space, the satellites are also able to orbit the earth effortlessly because they have less weight.
Can you generate electricity from sun via satellite?
Many satellites have solar panels to generate electricity but it is not so simple to transmit that power back to Earth because the power density used might be harmful to life on Earth at the place where the beam arrives.
How do satellites take pictures?
Satellites take pictures by using cameras and sensors to capture images of the Earth from space. These images are then transmitted back to Earth for analysis and use in various applications such as weather forecasting, mapping, and environmental monitoring.
How do satellites send images and data back from space?
Satellites send images and data back to Earth using radio waves. The satellite collects the information with its sensors and cameras, processes it, and then transmits it to ground stations on Earth. The ground stations receive the data and images, often through large antennas that are pointed at the satellite as it passes overhead.
How do satellites take pictures from space?
Satellites take pictures from space using cameras and sensors that capture images of the Earth's surface. These images are then transmitted back to Earth through radio signals for analysis and use in various applications such as weather forecasting, mapping, and surveillance.
What is a instrument that gathers information and sends it back to earth?
A common instrument that gathers information and sends it back to Earth is a satellite. Satellites can collect various types of data, including images, weather information, and scientific measurements, and transmit this data to ground stations for analysis. They are essential for communication, navigation, and Earth observation. Examples include weather satellites and Earth observation satellites like Landsat.
What instruments are used to send pictures from outer space to earth?
Instruments like cameras and sensors are used on spacecraft to capture images of outer space. These images are then transmitted back to Earth through radio signals using antennas such as high-gain and low-gain antennas. The data is received by ground stations on Earth, which then process and distribute the images to the relevant organizations for further analysis.
What gathers information and sends it back to earth?
A satellite is a device placed in orbit around Earth that gathers information, such as images or data, and transmits it back to Earth. Satellites are used for a wide range of purposes, including weather forecasting, communication, and mapping.
What were Echo 1 and Telstar 1?
Communications satellites, launched in the 1960's. There were 2 Echo satellites, which were passive (the signal would bounce back to earth like a mirror). The Telstar satellites were active, meaning that the signal was retransmitted back to earth.
What happens to old satellites?
Old satellites orbiting near the Earth eventually fall back into the atmosphere and burn. Satellites orbiting farther away stay in orbit indefinitely.
How do satellites get the weather?
Satellites take pictures and accumulate other information into the computer. They analyze the data and send it back to weather stations on earth.
How do statelites and computers work together to provide images of earth?
Satellites equipped with various sensors and cameras orbit the Earth, capturing images and data about its surface, atmosphere, and weather patterns. These images are transmitted back to ground stations, where powerful computers process and analyze the data. The computers enhance the images, extracting valuable information such as land use, vegetation health, and climate changes. This collaboration enables scientists, researchers, and decision-makers to monitor and understand the Earth's environment more effectively.
What satellites orbiting earth that receive radiotelevisionand telephone signals and then transmit them around the world?
The satellites that orbit Earth and facilitate the transmission of radio, television, and telephone signals are known as communication satellites. These include geostationary satellites, which remain fixed over a specific point on the Earth's surface, such as the Intelsat and SES satellites. They receive signals from ground stations, amplify them, and then retransmit them back to different locations on Earth, enabling global communication. Examples of specific satellites include the Astra and DirecTV satellites.
How are pictures taken of earth?
High resolution satellites (e.g. those operated by commercial satellite companies like GeoEye or DigitalGlobe) are used to take pictures of Earth. A lot of the imagery comes from aerial photographers mostly in airplanes with special high resolution cameras. Some of the imagery even comes from kites and balloons.
