A sky map is created by astronomers to identify, name, and plot celestial objects it is a map of the sky made by dividing the celestial sphere into 88 different areas.
Salinization and desertification
Explanation:
In the planet Earth , there are movement like the plate tectonics , which makes the surface of earth crust to move continuously , which is capable to generate lines of individual islands and volcanoes .
But these type of tectonic movements are not possible in Venus or Mars .
Thereby making the surface of earth different from that of planet Mars and Venus .
