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The further something is away form us the longer the light from it has been travelling to reach us. Thus when we look at very distant objects (galaxies) we see them as they were in the distant past when they were young. The more distant they are the younger/earlier they are. This effect is enhanced by the expansion of the universe which also makes the light from distant objects shift towards the red end of the spectrum.
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Why do scientists study distant galaxies to learn about galaxies?
cuz they are explorers
How can scientist learn about earlier galaxies by studying distant galaxies?
Depending upon how distant the galaxies are, in some cases it takes light billions of years to reach our planet from distant galaxies, which means that we are not seeing those galaxies as they are now, but we are instead seeing them as they were, billions of years ago. The more distant a galaxy is, the longer it takes for its light to reach us, and therefore the earlier the galaxy that we are observing.
Why can astronomers learn about the past by looking at distant galaxies?
The light of those distant stars and galaxies took an appreciable period of time in getting here to be detected in our telescopes. So when we look at distant galaxies, we're seeing the light that those galaxies emitted thousands, millions or BILLIONS of years ago. So it almost is like looking back in time.
What was the problem with early compound microscopes?
Because early compound microscopes does not let scientists learn more about cells and does not let scientists look at cells more closely than today compound microscopes.
Why do you need to learn about the solar system galaxies and the universe?
We need to learn about solar system, galaxies and universe because it will help us in the future....
Why do scientists study distant galaxies to learn about galaxies?
cuz they are explorers
How can scientist learn about earlier galaxies by studying distant galaxies?
Depending upon how distant the galaxies are, in some cases it takes light billions of years to reach our planet from distant galaxies, which means that we are not seeing those galaxies as they are now, but we are instead seeing them as they were, billions of years ago. The more distant a galaxy is, the longer it takes for its light to reach us, and therefore the earlier the galaxy that we are observing.
Two things scientists hope to learn from the Hubble Project?
One of the main aims of the Hubble project was to provide high resolution images of distant galaxies that had not been possible before.
Why can astronomers learn about the past by looking at distant galaxies?
The light of those distant stars and galaxies took an appreciable period of time in getting here to be detected in our telescopes. So when we look at distant galaxies, we're seeing the light that those galaxies emitted thousands, millions or BILLIONS of years ago. So it almost is like looking back in time.
How do scientists learn about galaxies?
they learn by going to a good school and study the stars and planets
Do scientist study other galaxies because they want to learn about the speed of light?
No. We already know a good deal about the speed of light. Scientists study other galxies to learn how galaxies work.
What do scientists study to learn more about early humans?
Fossils
Why do scientist study distant galaxies to learn about early galaxy's?
If you look at a distant galaxy, the light from the galaxy has travelled for perhaps a hundred million years, a billion years, or up to an age close to the age of the Universe (13 billion years or so), depending on the galaxy's distance. Thus, the light you see shows you how the Universe was billions of years ago.
How did scientists learn about early humans?
Fossils and going through their garbage (and sometimes their graves).
What did scientists learn about it?
Scientists learn a few different things. Scientists learn new things very day.
What was the problem with early compound microscopes?
Because early compound microscopes does not let scientists learn more about cells and does not let scientists look at cells more closely than today compound microscopes.
Why do you need to learn about the solar system galaxies and the universe?
We need to learn about solar system, galaxies and universe because it will help us in the future....
