Post on 26-Mar-2015
transcript
How Far is Far?
Average of 238,000 Miles
Earth to Moon Distance
93,000,000 Miles1 Astronomical Unit (AU)
Sun to Earth Distance
Body AU Mercury .39Venus .72Earth 1.0Mars 1.5Jupiter 5.2Saturn 9.5Uranus 19.2Neptune 30.1Pluto 39.5
Solar System Model
Diameter Orbital Radius Model Diameter Scaled RadiusBody in Miles in Miles in Inches in Feet
Sun 865,000 9
Mercury 3,032
36,000,000 .0314 31
Venus 7,521 67,000,000 .0782
58
Earth 7,926 93,000,000 . 0823
81
Mars 4,228 141,000,000 . 0437
123
Jupiter 88,846 483,000,000 .9021
419
Saturn 74,898 886,000,000 .7528
769
Uranus 31,763 1,782,000,000 .3035
1,546
Neptune 30,775 2,794,000,000 .2937
2,425
Pluto 1,423 3,666,000,000 .0 140
3,186
Calculating Distance
Viewpoint B
Viewpoint A
Viewpoint A Viewpoint B
Parallax
Parallax
Viewpoint B
Viewpoint A
186,000 miles/second
The Light-Year
X 60 minutes/hour X 24 hours/dayX 365 days/year
X 60 seconds/minute
5,865,696,000,000 miles/year
Proxima Centauri
Alpha Centauri A & B
Our Nearest Neighbors
4.2 Light-Y
ears
5 Light-Y
ears
The Solar Neighborhood
~ 40,000 Light-YearsGalactic Center
100,000 Light-Years
The Size of Galaxies
The Galactic Neighborhood
2 Million Light-Years
Hubble Deep Field Image
Questions?