1. Laws of Motion
Newton and Kepler

2. Isaac Newton English physicist Developed the Laws of Motion
1st Law of Motion
An object in motion stays in motion unless acted upon by an outside force. An object at rest stays at rest unless acted upon by an outside force.

3. 2nd Law of Motion 3rd Law of Motion
The acceleration of an object is in the same direction as the net force on the object
F = ma
3rd Law of Motion
For every action there is an equal and opposite reaction

4. Johannes Kepler Kepler developed the Laws of Planetary Motion
The orbit of every planet is an ellipse.
A line joining a planet and the sun sweeps out equal areas during equal intervals of time as the planet travels along its orbit.
Longer orbits have longer periods, and the speed of a planet in a larger orbit is lower than in a smaller orbit.

5. Formation of the Universe
It is believed that the Universe started 13.7 billion years ago as a massive explosion
The entire Universe was confined to a dense, hot, supermassive ball
But how do we know this?
All galaxies appear to be moving away from the Earth
Data indicates the universe is still expanding
Cosmic background radiation

6. Formation of a Galaxy
Astronomers have come up with multiple theories as to the formation of galaxies
One theory suggests that after the Big Bang millions of gas clouds (nebulae) and star clusters merged together

7. We are here

9. Center of Galaxy
Milky Way galaxy is 100,000 light years across and 3,000 light years thick
Light travels 10,000,000,000,000 kilometers in one year