1.1 ASTRONOMICAL MEASUREMENTS. Where Are You?. To find our place among the stars, we will zoom out from a familiar scene, to the largest scales of the universe. Each picture will widen your field of view , the region you can see in the image, by about a factor of 100.
“The longest journey begins with a single step”
- Lao Tzu
Park Scene 16 x 16 m.
City Scene 1 mile x 1 mile
Pennsylvania Landscape 100 miles x 100 miles
Diameter of Earth 12,756 km.
Distance from Earth to Moon 384,000 km.
5.26 + 1 + 29 – 3.74
2.3 x 4.28 x 6 x 1.05
Least significant decimal place
in measurements is located in
the ones position
Least number of sig figs
in measurements is 1
3.84 x 105
Distance from Sun to Earth 150,000,000 km.
Diameter of Pluto’s Orbit Approx. 100 AU
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Empty space around solar system 10,000 AU
The solar neighborhood Approx. 17 light years
The extended solar neighborhood Approx. 1,700 light years
Diameter of Milky Way Approx. 80,000 light years
Distance to the nearest large galaxies Several million light years
Clusters of galaxies are grouped into superclusters, which form filaments and walls around voids.
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1 person 12 slices
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