1. How Far is Far?

3. Earth to Moon Distance
Average of 238,000 Miles

4. 1 Astronomical Unit (AU)
Sun to Earth Distance
1 Astronomical Unit (AU)
93,000,000 Miles

5. Body AU
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto

6. Solar System Model
Diameter Orbital Radius Model Diameter Scaled Radius
Body in Miles in Miles in Inches in Feet
Sun ,
Mercury , ,000,
Venus , ,000,
Earth , ,000,
Mars , ,000,
Jupiter , ,000,
Saturn , ,000,
Uranus , ,782,000, ,546
Neptune , ,794,000, ,425
Pluto , ,666,000, ,186

7. Parallax Calculating Distance
Viewpoint A
Viewpoint B
Viewpoint A
Viewpoint B

8. Parallax
Viewpoint A
Viewpoint B

9. The Light-Year 186,000 miles/second X 60 seconds/minute
X 60 minutes/hour
X 24 hours/day
X 365 days/year
5,865,696,000,000 miles/year

10. Our Nearest Neighbors Alpha Centauri A & B Proxima Centauri
5 Light-Years
4.2 Light-Years

11. The Solar Neighborhood
Galactic Center
~ 40,000 Light-Years

12. The Size of Galaxies
100,000 Light-Years

13. The Galactic Neighborhood
2 Million Light-Years

14. Hubble Deep Field Image

15. Questions?