1. The Universe

2. The universe
Definition- all of space and everything in it

3. The Big Bang Theory
Scientists believe that our universe began with a big explosion of gas and dust in space. This explosion is called the Big Bang.
The Big Bang is the theory of how the universe
was formed.
All of this matter and energy in space was concentrated in the Primeval Atom before the Big Bang.
They believe this explosion occurred about 15 billion years ago.
Since that time, the universe has been expanding (getting bigger and more spread out).

4. All the pieces scattered and formed different things in our universe
It was made up of metals, gases, and dust
All the pieces scattered and formed different things in our universe

5. animation of the formation of the universe:

6. our solar system
Our solar system consists of the sun, planets, dwarf planets (or plutoids), moons, an asteroid belt, comets, meteors, and other objects.
The sun is the center of our solar system; the planets, over 61 moons, the asteroids, comets, meteoroids and other rocks and gas all orbit the Sun.

7. This is the compostion of our solar system: Sun: 99. 85% Planets: 0
This is the compostion of our solar system: Sun: 99.85% Planets: 0.135% Comets: 0.01% ? Satellites: % Minor Planets: % ? Meteoroids: % ? Interplanetary Medium: % ?

9. BRAINPOP!!

10. galaxy definition: A cluster of hundreds of billions of stars.
Our galaxy is the Milky Way.
The Milky Way is a spiral galaxy.
Our solar system is on a spiral arm of the Milky Way.
light year- distance light travels in one year. (light travels at a speed of 300,000km/sec

11. The Milky Way Galaxy

12. Types of Galaxies: Spiral galaxies
Huge; contain stars,
gas, and dust
Held together by
gravity
Pinwheel shape
Young and old stars
are present

13. Types of Galaxies: Elliptical galaxies
Huge; contain stars, gas, and dust
Held together by gravity
Round-to-oval shape
Mainly old stars are
present

14. Types of Galaxies: Irregular galaxies
No regular shape
May show signs of a
disk and/or a bulge;
halo is present
Usually rich in gas and
dust
Young and old stars
are present

15. BRAINPOP!!