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in relation to earth the sun is in the center of our solar system and we revolve around the sun
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This is probably about the "horizon coordinate system". Or, it's sometimes called the horizontal coordinate system. The system uses "altitude" and "azimuth" as coordinates. The azimuth is normally measured from due North as zero. So, that's the "three reference points", probably. Altitude is the angular height of a star above the horizon. Azimuth is the angle of a star measured along the horizon, from the pole.
The phase of the moon depends on it position in relation to the earth and the sun. For instance, when the moon is in between the earth and the sun, this is the new of full moon phase.
They change position against the background of the distant stars because they are much closer to us, and they are orbiting around the sun, as are we.
the answer is motionAn angle.DisplacementMotion is a change in the position of an object in relation to a reference point.
describe the geograhical position of Australia in relation to the hemispheres
With coordinates. A reference frame is chosen (a point of origin, and directions), and the position is described with two or three numbers (one for each dimension required), in relation to the point of origin.
describe the general goegraphical position on New Zealand in relation to the international date line
in relation to earth the sun is in the center of our solar system and we revolve around the sun
size:9th posistion:3rd
describ the position of venous blood vessels in relation to arteries, nerves and other structures
distal
Yes - all possible reference points are moving in relation to one another.
. . .point of reference. For example, one can tell whether a planet is moving according to its position in relation to a star.
Relative motion is movement in relation to a frame of reference.
Australia is somewhat west of the International Date Line.