The near side of a galaxy is tens of thousands of light-years closer to us than the far side; thus we see the front as it was tens of thousands of years before the back. But typical events in galactic dynamics occupy tens of millions of years, so the error in thinking of an image of a galaxy as frozen in one moment of time is small.
("Cosmos")
More Quotes from Carl Sagan:
There are many hypotheses in science which are wrong. That's perfectly all right: it's the aperture to finding out what's right. Science is a self-correcting process.Carl Sagan
The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together.
Carl Sagan
All inquires carry with them some element of risk. There is no guarantee that the universe will conform to our predispositions.
Carl Sagan
We are star stuff which has taken its destiny into its own hands.
Carl Sagan
Science is a way of thinking much more than it is a body of knowledge.
Carl Sagan
It Is of interest to note that while some dolphins are reported to have learned English -- up to 50 words used in correct context -- no human being has been reported to have learned dolphinese.
Carl Sagan
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Based on Topics: Error & Mistake Quotes, Thought & Thinking Quotes, Time QuotesBased on Keywords: galactic, light-years
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