1. Our Solar System

2. Formation of a solar system according to the Big Bang Theory

3. Nebula
The dust and gas clump together in huge interstellar clouds called nebulas (or nebulae),

4. Solar Nebula A nebula that has collapsed inward from its own gravity
Under great pressure the gas ignites and begin to burn
A star is born
Solar Nebula is a nebula with a star

5. Planets Form
Because of their greater gravitational attraction, the largest planetesimals begin to collect more and more of the dust and gas of the solar nebula.

6. Planetesimals
The star in the nebula causes the remaining gas and dust to swirl around These gases and dust also colloid and form small group of matter called Planetesimals

7. Solar System Crash
Smaller planetesimals collide with the larger ones, and planets begin to grow.

8. Dangerous earlier Solar System
Smaller planets,
comets and asteroids
continue to crash into
larger planets

9. Solar System has been formed

10. The planets of our solar system differ in size, composition (rock or gas), surface and atmospheric features, and distance from the sun. Planets move around the sun in nearly elliptical (circular type) orbits.

11. The sun is a medium-sized star located near the edge of the Milky Way Galaxy.
The planets are divided into two groups. The inner planets are smaller, closer to the sun, and have rocky surfaces, while the outer planets are larger, farther from the sun and do not have solid surfaces.

12. Our solar system is a single star system, located in the Milky Way Galaxy.
The Big Bang Theory states the solar system is about 4.6 billion years old.

13. What we are compared to other solar systems

14. Here is Earth compared to the inner planets plus the dwarf planet Pluto

15. Here is Earth and the other inner planets compared to the outer planets.

16. Our planets compared to our sun

17. Our sun compared to other suns

18. Still, other suns