1. A Solar System is Born

2. Solar system – planets and other celestial bodies that travel around a star.
Nebula – A very large cloud made of dust and gas.
Mass – The measure of how much matter an object has.
Gravity – the force of attraction between two objects (pulling).
Pressure – the force of push created when two objects collide or come in contact.

3. Our Solar system

4. Eagle Nebula

5. Youngest planetary nebula known to scientists

6. The formation of a star

7. Formation of a solar system

8. Planetesimals – Tiny building blocks of planets.
Orbit – the path the Earth travels around the sun.
Astronomical Unit (AU) – The average distance between the Earth and sun (93,000,000 miles or 150,000,000 km)

9. Planetesmial collision

10. Rotation – the spinning of an object on its axis

11. Revolution – the motion of an object as it orbits another body in space

13. Kepler’s First Law

14. Kepler’s second Law

15. Kepler’s Third Law
The rule is this: in the Solar System, the orbital periods, squared, are proportional to the orbital semimajor axes, raised to the third power.

16. Gravity
ALL objects attract each other with a force of gravitational attraction. Gravity is universal. This force of gravitational attraction is directly dependent upon the masses of both objects and the distance between them.

17. Newton’s Universal Law of Gravitation

18. Guess who?????