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Explain why objects that are farther away look younger to us than if they were closer to us?
Wiki User
∙ 12y ago
light from any source takes time to reach us, it merely travels so fast that we percieve it as being instant because we tend to be very close to the sources of light we manipulate.
when we see light from a galaxy 1000 light years away, we are seeing light that was emitted by that galaxy 1000 years ago, and if this galaxy suddenly disappeared, we wouldn't know about it for 1000 years, until the last of its light arrived and then no more. if you consider this in cosmic terms, were we to study a region of the universe 1 billion light years away, we would be looking at something 1 billion years old, a snapshot of what the universe looked like a billion years ago, a younger universe.
probably helps to explain what younger means here: in space the universe is basically the same everywhere, stars in galaxies in clusters, but in time the composition has changed as chemical and nuclear reactions have altered the various quantities of different substances. so we see a galaxy a billion light years away, its composition will be of an earlier order than the composition of a nearer galaxy.
As the universe expands galaxies move farther apart, the light more faint.
Wiki User
∙ 12y ago
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Would an object have a greater gravitational pull closer or farther from earth?
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To focus the image, you have to move the object you are studying closer to or farther from the objective lens.
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What is a system in a drawing based on the idea that closer objects are smaller than farther away object?
linear perspective. Hope that help! :)
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