Gravity
The moon doesn't smash into the earth because the gravity from the earth keeps the moon in orbit around it.
It is weight, if I understand your question.
Have wavelengths that are longer than normal.
Answer:
Big Bang theory has occurred because about two thousand million years ago, a star came close to the sun. The molten mass on it melted and formed a huge mountain. Due to the high pressure, the star repelled back and the mountain separated into pieces. These pieces started revolving aound the sun and are known as planets. The existence of these planets is known as big bang theory.
Explanation:
The thing that pushes the object up while it is falling is air. This force is known as "air resistance".
