Flexi Says: The constellations stay the same night after night. The patterns of the stars never change. However, each night the constellations move across the sky. They move because Earth is spinning on its axis. The constellations also move with the seasons. This is because Earth revolves around the Sun. The constellations in the winter are different from those in the summer. For example, Orion is high up in the evening sky from January to March in winters of the northern hemisphere and summer of the southern hemisphere. In the summer, it's only up in the early morning.
