HELIOCENTRIC!!! WE BELIEVE IN THE SUN in the center !! Geocentric is the earth is in the center but the question is asking about our current understanding
GIS is basically used to study geologic features and etc, it creates 3D displays of geographic features
circle of latitude are unlike circle of longitude which are all great circle with the centre of the earth in the middle as the circle of latitude get get the smaller as the distance from the equator increase the 60th parallel parallel North or South is half as long as the equator so the latitude of a circle but longitude are only half circle
