Outerspace and gravity

       In class we have been learning about our solar system and the forces that control it.

            Gravity:

Gravity is the force that affects anything with mass. It takes these physical bodies and pulls it to the center of the earth. In space, there is zero gravity because it is far away from the pull of a planet. 

                Newton’s Laws

Newton’s laws apply in zero gravity as well as on earth. Newton’s theory explains how motion occurs through three laws. The first law is known as the “law of inertia” and explains that an object in motion will stay in motion and an object at rest will stay at rest. The second law is F=ma (force equals mass times acceleration) and explains how mass and acceleration can affect the force of an object. For example, if the mass of an object is greater, the acceleration will decrease (or vise versa), changing how the force interacts with it.

Solar Nebula Theory

The solar nebular hypothesis is the theory of how the galaxy formed. Through the explosion of a star going super nova, the scattered star dust then begins to crash together and form planets, which then begin to revolve around the nearest star and form an orbit. 

Keplar’s Laws

Keplars law are three laws that explain planetary motion the are ,The Law of Ellipses which is the law that describes that the planets move in a ellipses orbit around the sun. The second law is The Laws of Equal Areas which describes the speed of which any given planet is moving while orbiting around the sun. The finally law is called The Law of Harmonies which describes that the farther away from the sun a planet is, the longer it takes to orbit around the sun.