1. The Sun and Light Years

2. What do you already know about stars?
The Sun and Light Years
Our Sun
What do you already know about stars?

3. The Sun and Light Years Our Sun Characteristics: Medium sized star
In relation to the 50 stars closest to earth, it is the 4th largest in mass
The suns light takes 8.3 minutes to reach the earth

4. Which size do you think the sun is?
Medium Size Star
Which size do you think the sun is?

5. Location in our Spiral Galaxy
The Sun and Light Years
Our Sun
Location in our Spiral Galaxy
Milky Way Galaxy on an edge of a spiraled arm, far away from the center of the galaxy

6. Location in our Solar System
The Sun and Light Years
Our Sun
Location in our Solar System
Solar system: It is the center of our solar system
149.6 million Kilometers away form the earth
Closest star to earth

7. The Sun and Light Years Light Years
Light year: the distance light travels in one year
It is a unit of speed, not time
It is similar to miles per hour

8. The Sun and Light Years Light Years The Speed of Light
The speed of light travels at 300,000 kilometers per second
So, for every 1 second, light travels 300,000 kilometers

9. The Sun and Light Years Light Years Why do we use light years?
Because the universe is so huge, light years are used to measure distance

10. The Sun and Light Years Light Years Using Telescopes
When looking through a telescope, the light that is seen has traveled to earth
What does that tell us about the universe and what we can see from earth?

11. The Sun and Light Years Light Years Answer:
There is a time delay when we see light from space, depending on the distance of the object

12. The Sun and Light Years Light Years
If a star’s light takes 5 seconds to travel to earth, how far away is the star?