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Studying distant galaxies is described as looking back into the past What does this mean?
Wiki User
∙ 14y ago
When we view an object in space, we are notobserving it "as is" we are observing it "as it was". What we are seeing, is the light that was emitted at that time.
For example: A galaxy is 1,000,000 light years away. When we view it, we are seeing it as it was 1,000,000 years ago, because that is how long light has taken to get to us.
The galaxy may well have been swallowed by a giant mutant turtle 999,998 years ago, but we will not know for another year.
So we are seeing objects in space as that were, relative to their distances from us, not what they are. Eg looking back in time.
Wiki User
∙ 14y ago
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Are there pink looking galaxies?
Yes.
How can you see the past looking through a telescope at a distant object?
Scientist investigate the early universe by observing objects that are extremely far away in space.Beause it takes time for light to travel through space,looking through a telescope is like looking back in time one travels. Looking at distant galaxies evolve through time and perhaps what caused them to form in the first place.Scientiiist have already found some very strange looking objects in the Early universe.
Do you really look in to the past when you look through a telescope at galexes light years away. why?
Yes it is true. we actually look in the past when looking at distant galaxies. It is because the light emitted by the billions of stars in the galaxies take thousands of millions of years to reach our eyes. So whatever we are looking in the sky has taken place in past. What is happening in the present, we will only know after the light emitted from the object reaches our eyes.
Does NASA know of any other galaxies?
Yes. Looking at a deeps space image it is apparent that the universe is filled with Galaxies. It is estimated that there are about 200 billion galaxies in the observable universe.
How do astronomers observing distant galaxies talk about looking backward in time?
The speed of light is not infinite. Light takes time to travel from distant galaxies to our eyes here on Earth. If a galaxy is 1 billion light years away, it has taken 1 billion years for the light emitted by said galaxy to reach us here, so (obviously) we are seeing the light emitted 1 billion years ago. In a sense, we are seeing 1 billion years into the past at the light emitted by that galaxy.
Who said that there were other galaxies?
Astronomers, looking at deep space photographs of the Universe.
How do geologist study rock?
By looking at the sedimentary and studying it
How do scientists see what early galaxies looked like?
they see the past when they look up and see the galaxies. its looking back in time because light can take years to travel to earth and so its like their looking at the youth of the galaxy.
Why astronomers have difficulty looking at distant stars except?
Astronomers have difficulty looking at distant stars because while we have highly specialized telescopes, they are in constant contention with various other celestial bodies. In addition to this, the light of distant stars takes hundreds of thousands of years to reach us, making it impossible to get a current look at a distant star.
How does the focal length of the lens change when you sift looking from a distant object to nearby object?
The focal length of the lens can be changed by the ciliary muscles in the eye due to which we can shift looking from a distant object to nearby object .
Why is it important to view galaxies that are far away and galaxies that are close?
To know what is the life there, and if there's any other creatures or "aliens". some scientists are looking for planets with water and life on them.
How do astronomers learn about distant objects in the universe?
Mass spectography, xray detectors, infrared detectors, and just visible light allow scientists to differentiate between planets, stars, solar systems, coets, galaxies and cluster galaxies. Each one has it's own fingerprint and like people, it's own traits.
