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Are objects in communications satellites weighless?
Objects in communication satellites still have weight, as weight is a measure of the force of gravity acting on an object. However, in the microgravity environment of space, objects appear weightless because they are in free fall around the Earth.
What is meant by a geostationary orbit and what is it used for?
A satellite in a geostationary orbit goes around the earth at the same angular speed that the earth spins on its axis. So to someone on the earth the satellite looks like its not moving because its always at the same location above the earth. These satellites are used for communication purposes. For example, TV stations can reflect their signal off of such a satellite by aiming their transmitter at it. They don't have to change their aim because the satellite is always there. Satellite dish receivers can easily pick up the reflected signal just by aiming the dish antenna at the satellite and again you don't have to change this aim because the satellite is always there. The satellites have to be in a circular orbit above the equator in order for it to be put in a geostationary orbit.
Can you see satellites from the ground?
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.
Can rainbows never appear?
Rainbows cannot appear if there's no rain and sun afterwards. Rainbows root word is rain so for that reason rain has to appear in this event. But sum rainbows can appear in different weather? Rainbows cannot appear with out rain. Rainbows cannot appear with out rain. ----
Is any kind of satellite stationary in the night sky?
Yes. There are many satellites that are geostationary. That is they remain fixed over the same relative position of the Earth. In the night sky, it would appear to not move in relation to the background stars and other stellar bodies.
What is the significance of the geo orbit radius in relation to satellite communication?
The geo orbit radius is significant in satellite communication because it determines the satellite's position relative to the Earth. Satellites in geostationary orbit, which have a radius of about 22,236 miles, appear stationary from the Earth's surface. This allows for continuous communication with fixed ground stations, making them ideal for services like television broadcasting and weather monitoring.
What is the inclination of a satellite to the earths equator?
There is no set inclination of a satellites orbit to the earth's equator. Once in space, the spin of the earth or where it's poles happen to be become irrelevant to the satellite. Many satellites like spy and weather satellites orbit over the two poles (north and south) while communication satellites are placed in orbit directly above the equator at a height that is synchronised with the earth's orbit. This way they stay permanently above the same place on the equator and do not APPEAR to move at all.
Are objects in communications satellites weighless?
Objects in communication satellites still have weight, as weight is a measure of the force of gravity acting on an object. However, in the microgravity environment of space, objects appear weightless because they are in free fall around the Earth.
What type of satellite orbits the earth at 22300 miles above the earth?
A satellite in a geostationary orbit orbits the Earth at around 22,300 miles above the equator. Geostationary satellites appear to be stationary in the sky relative to a fixed point on the Earth's surface, making them ideal for communication and weather monitoring.
What is the name of the orbit that allows satellites to orbit the earth but yet appear stationary?
The Earth orbit in which satellites appear to be stationary is called the, "Geostationary Orbit". Some call it a synchronous orbit.
How fast do UFO travel?
UFOs are merely unidentified objects that fly or appear to do so. They may be weather balloons, meteors, satellites or other objects. Their speed is dependant on what they are. What they are not is alien space craft.
What are true of a geostationary weather satellite except that it?
Orbiting the Earth above the equator is true of geostationary weather satellites and they have infrared sensors to transmit images of the entire hemisphere continuously. All of those things are true except that while they are moving in orbit they appear motionless.
Can you see satellites?
Yes, they appear as slowly moving stars in the night sky.
Which of the following is NOT likely to appear on a map?
Horizon
Where is each satellite positioned in the sky?
Satellites appear at different locations in the sky based upon the task that they must perform. Satellites that are in "low" Earth orbit, such as the GPS and some weather sats orbit the earth at only a few hundred miles above the surface. They move in relation to a fixed position on the Earth, though they follow well-defined orbits (hopefully). Satellites in "Geostationary" orbits, such as communication and other weather sats, are approximately 40,000 miles off the surface of the Earth more or less over the equator. Because of the distance and the speed at which they orbit, they appear stationary in the sky to a fixed observer. This is useful for satellites that broadcast continuous streams of data, like satellite television. Finally, there are satellites that are even farther out from the earth. These are used for scientific purposes. An example is SoHo, a satellite that studies the Sun, or COBE, the satellite that mapped out the cosmic background radiation. A new space telescope set to launch in 2011 (ish?) will actually orbit the sun, though will remain locked in a gravitational point in tandem with the Earth (called a Lagrange Point).
Why is it not sensible to put communication satellites into lower orbits?
There is only one orbital altitude where the satellites do not appear to move; that is the 23,500 mile "geo-synchronous" orbit where communications satellites typically reside. Lower orbits would cause the satellites to orbit more quickly, requiring that the terrestrial antenna be equipped to follow it as it passed over, and to be able to switch to a new satellite once the first one was below the horizon. Since satellite TV antennas are large and not easily movable, a geo-synch orbit makes more sense.
Why does the universe appear dark when seen in the photo from satellites?
There ias no atmosphere to scatter the sunlight like on earth.
