A constellation is a group of stars that when united by imaginary loops form a figure, these stars are connected imaginatively by loops to form these figures and are original from ancient cultures, mainly from the Middle East and Mediterranean Europe. The formation of constellations is due to the invariability of movement of the stars, on the other hand, the stars that form a constellation can be very far from each other and are only related by being part of a constellation. The celestial sphere is usually divided into two, the constellations that are to the north are known as northern constellations and those that are to the south southern constellations, these two are divided by means of the celestial equator. So, it is true, A constellation us a set of grouped into a figure.
the development of GPS and GIs technology helped the public transportation system in two ways: - First, it is easier for both drivers or passengers to locate the place that unfamiliar to them, which will reduce the cost and the time for travel.
When an oceanic plate converges with a continental plate, the oceanic crust will always subduct under the continental crust; this is because oceanic crust is naturally denser. Convergent boundaries are commonly associated with larger earthquakes and higher volcanic activity
