Constellations are the group of stars with certain pattern. Constellations are seen during specific period of year due to revolution of earth around the Sun. Sun blocks some constellations during specific part of year, making them invisible from earth.
Example: Cygnus and Sagittarius are the summer constellations that are visible during summer months while Taurus and Orio are the winter constellations.
Weathering and erosion are similar in that they both work together to change and shape the Earth's surface. While weathering breaks rock and earth down, erosion is the displacement of the pieces and particles of rock and earth.
