Our Place in Our Galaxy - PowerPoint PPT Presentation

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Our Place in Our Galaxy

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Our Place in Our Galaxy What s the Difference? What s the Difference? Where is our Solar System? Solar System How big is the Milky Way Galaxy? – PowerPoint PPT presentation

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Title: Our Place in Our Galaxy


1
Our Place in Our Galaxy
2
Whats the Difference?
Image credits NASA, STScI
3
Whats the Difference?
4
Where is our Solar System?
Solar System here
Visible stars, gas, dust in the Milky Way Galaxy
Image credits NASA, STScI
5
Solar System
6
How big is the Milky Way Galaxy?
100,000 light years
Image credits NASA, STScI
7
How far is 100,000 light years?
  • 1 inch represents 5.5 light hours (Sun to Pluto)

1 mile represents 40 light years 2,500
miles represents 100,000 light years
8
Continent of North America!
9
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10
And how thick is our Galaxy?
1000 light years
Credit NASA, COsmic Background Explorer (COBE)
Project
11
How thick is 1,000 light years?
If 2,500 miles represents 100,000 light years
25 miles represents 1,000 light years
12
200 BILLION Stars!!!
13
Fill with bird seed4 feet deep on a football
field
200 BILLION Stars!!!
14
Spread them over the continent 25 miles deep!
15
(No Transcript)
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