2. We know that the Earth is moving around the sun. When we look at the sky we see

that the sun rises in the east, slowly moves towards the west and sets there. Why?

Answer: The Sun, the Moon, the planets, and the stars all rise in the east and set in the west. And that's because Earth spins - - toward the east ... Earth rotates or spins toward the east, and that's why the Sun, Moon, planets, and stars all rise in the east and make their way westward across the sky.