Proof that universe is expanding.

I heard this proof in Stephen Hawking Show on Discovery Channel, now I am gonna share it.
1. Whenever objects comes towards you it appears bluish.

2. And whenever objects goes away from you it appears to be reddish. (called Doppler Shift)

Now whatever we see in universe appears to be red, it means they are going away from us, so we can say that universe is expanding.

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