Draw a diagram of the earth with the important latitudes the Prime Meridian and the longitude at 90 degree east and West mark the degrees
Answers
Answer:
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Explanation:
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Answer:
Explanation:
Prime meridian :
In a geographic coordinate system, a prime meridian is any line of longitude when longitude is defined to be 0°. A great circle is formed by a prime meridian and its anti-meridian (the 180th meridian in a 360° system). A spheroid, like the Earth, is divided into two hemispheres by this vast circle: the Eastern Hemisphere and the Western Hemisphere (for an east-west notational system). Different conventions have been used or supported for Earth's prime meridian throughout history in various places. The IERS Reference Meridian is the current international prime meridian for the Earth. It is developed from the former standard, the Greenwich Meridian, but significantly different.
In contrast to an equator, which is determined by the axis of rotation, a prime meridian for a planetary body that is not tidally locked (or at least not in synchronous rotation) is completely arbitrary. While equators are defined by rotation, prime meridians for celestial objects that are tidally locked (more particularly, synchronous) are determined by the face that is always inward of the orbit (a planet facing its star or a moon facing its planet).
The Earth and Moon's longitudes are calculated from their prime meridian (at 0°) to 180° east and west, respectively. All other bodies in the Solar System have longitudes between 0° (their prime meridian) and 360°. If a body rotates progradely (or "directly," like Earth), west longitudes are employed meaning it rotates in the same direction that it orbits in. In the case of a retrograde rotation, east longitudes are employed.
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