Our postal address
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Our postal address in the universe The universe How did we come to be? How do we know the past? Cosmic questions How big is the observable universe? How old is it?
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Transcript of Our postal address
![Page 1: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/1.jpg)
Our postal address in the
universeThe universe
How did we come to be?
How do we know the past?
Cosmic questions
How big is the observable universe?
How old is it?
![Page 2: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/2.jpg)
The universe
![Page 3: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/3.jpg)
Solar system
![Page 4: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/4.jpg)
Our Sun neighborhood
![Page 5: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/5.jpg)
Milky way
![Page 6: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/6.jpg)
Orion arm
![Page 7: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/7.jpg)
Our local group
![Page 8: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/8.jpg)
Our galaxy cluster
![Page 9: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/9.jpg)
Milky Way & Andromeda collision
![Page 10: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/10.jpg)
Our supercluster
![Page 11: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/11.jpg)
Our postal address (again)
![Page 12: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/12.jpg)
How did we come to be?
![Page 13: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/13.jpg)
Microwave background. COBE
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Microwave background. Planck
![Page 15: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/15.jpg)
How do we know the past?
![Page 16: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/16.jpg)
A voyage from the Sun to the Earth
![Page 17: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/17.jpg)
Cosmic questions
![Page 18: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/18.jpg)
Can we see the entire universe?
![Page 19: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/19.jpg)
What is our universe made of?
![Page 20: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/20.jpg)
How will it end?
![Page 21: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/21.jpg)
How big is the observable universe?
![Page 23: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/23.jpg)
Closest neighbours I
![Page 24: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/24.jpg)
Closest neighbours II
![Page 25: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/25.jpg)
Grains of sand
![Page 26: Our postal address](https://reader031.fdocuments.in/reader031/viewer/2022022415/5a67ebc17f8b9ab9398b5b9d/html5/thumbnails/26.jpg)
How old is it?