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By studying galaxies much farther away. The logic behind that is that since distances are so great in deep space and light can take billions of years to cross those distances, you can see what a galaxy looked like a billion years ago if it is located a billion light-years away. It is possible to get an idea of galaxy evolution because of that.
People also model galaxy evolution on super computers by throughing in real life parameters. While not real galaxies, if the model works then it's most probably because the parameters that have been programmed into the computer are correct and that scientists are onto something.
What else can I help you with?
Do scientists know of any other galaxies in the universe besides the Milky Way?
Yes.
How do scientists study the movement of galaxies in the universe?
blah blah blah... I dont know...
Do scientists know everything about space and space travel?
No, they don't. There is so many (beyond numbers) galaxies that it is impossible to know everything.
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.
Why do scientists study distant galaxies to learn about galaxies?
Scientists study distant galaxies to understand the formation, evolution, and properties of galaxies over time. By observing galaxies that are far away, they can explore the universe at different epochs and gain insights into how galaxies have changed and evolved since the early universe. Studying distant galaxies also helps scientists refine theories about the laws of physics and the nature of the universe as a whole.
How do scientists know so much about stars in distant galaxies?
Scientists use telescopes to observe and analyze light emitted by stars in distant galaxies. By studying the light's intensity, temperature, composition, and movement, scientists can gather information about the stars' age, size, distance, and other properties. This data helps scientists understand the behavior and characteristics of stars in those galaxies.
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.
Why do they think there are hundreds of thousands of galaxies?
They (scientists) think there are hundreds of thousands of galaxies because the universe is limitless so there may be billions of galaxies!
What do scientists know about the size of the universe?
We know that we have observed galaxies out to as much as 14 billion light years from us in every direction, and we have never seen an end to it yet.
Scientists believe that the more distant galaxies formed?
Scientists believe that galaxies formed earlier in the universe's history, with the most distant galaxies being some of the first to have formed after the Big Bang. Studying these distant galaxies can provide insights into the early stages of galaxy formation and evolution.
Why do scientists believe that there are billions of stars in galaxies?
Because they can see them.
Are there at least 350 billion or more large galaxies in the observable universe?
Yes, because scientists have found hundreds and hundreds of galaxies already and scientists say that there are more galaxies out there that they haven't found!
