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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?
The universe
Solar system
Our Sun neighborhood
Milky way
Orion arm
Our local group
Our galaxy cluster
Milky Way & Andromeda collision
Our supercluster
Our postal address (again)
How did we come to be?
Microwave background. COBE
Microwave background. Planck
How do we know the past?
A voyage from the Sun to the Earth
Cosmic questions
Can we see the entire universe?
What is our universe made of?
How will it end?
How big is the observable universe?
Closest neighbours I
Closest neighbours II
Grains of sand
How old is it?
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