Moozy
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Very often for copyright considerations, they publish artist's view, or 3D images instead of received real images.
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Thank you Janus for this detailed answer. I am reading a book on the "run away" of galaxies (in french, "la fuite des galaxies") and I wanted this point to be clarified (a Doppler effect can be detected on a stationary object provided the receiver is moving).
By the way, Happy New Year 2015 to all the distinguished members of this forum
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Thanx robittybob1, but I was expecting more elaborate answers... The question is not as 'shallow' as it may seem
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About the Doppler effect: We know that when a vehicle passes at high speed in front of a stationary observer, the sound of the horn is high frequency when the vehicle approaches, then low frequency when the vehicle moves away.
My question: what happens when, on the contrary, a moving observer passes at high speed a stationary vehicle honking? Do we get the same Doppler effect?
My guess: the effect is the same ...
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Doppler Effect
in Classical Physics
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@ Strange :
Question: Why cosmoslogists have come to the conclusion that the universe is expanding ? Answer: The redshift (i.e. the Doppler effect) of galaxies.