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The vast distances involved means that the light we see left those galaxies a long time ago.

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Q: When scientists look at very distant galaxies through powerful telescopes they see the galaxies as they were millions or billions of year ago. Why is this?
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When scientists look at very distant galaxies through powerful telescopes they see the galaxies as they were millions or billions of year ago Why is this?

The vast distances involved means that the light we see left those galaxies a long time ago.


Why do scientist see the galaxies if they were millions and billions of years ago?

The galaxies beyond our own are millions to billions of light years away, meaning the light takes millions to billions of years to get here.


Do Galaxies contain millions of stars?

Smaller galaxies do. Larger galaxies contain billions or even trillions of stars.


How many stars are in galaxies millions or billions?

Billions at least, in the large galaxies. Obviously it depends on the size of the galaxy. It is estimated that in our Galaxy there are at least 100 billion and perhaps as many as 400 billion stars. Many galaxies are same sort of size as ours and some are much bigger. However, there are a lot of small "dwarf galaxies" The smaller dwarf galaxies have millions rather than billions of stars.


List of names for numbers such as Millions Billions Trillions etc?

trillions, billions, quadrillions, millions, there are many more that scientists have not discovered.


Do galaxies emit light and why?

Well, you can see them, right? - Galaxies contain millions or billions of stars; each of these stars emit light.


Is the solar system the only system in our galaxy?

No - there are countless millions of likely solar systems in our galaxy - and there are countless millions of galaxies in the known universe. 2nd Answer: Change 'millions' to 'billions', and change 'billions' to 'trillions'.


Is the universe made up of hundreds of millions of galaxy's?

Not just hundreds of millions. The observable universe contains hundreds of billions of galaxies.


Are there at least 100 billion or more galaxies in the universe?

We are not sure exactly how many galaxies are in the universe. There could very possibly be millions or even billions.


Why does someone believe you when you say there are four billion stars?

There is one star in the solar system and millions to billions of stars in one galaxy and billions of galaxies in the universe. So i see no reason why they should disagree with you.


What acronym is for millions and billions?

mil. = millions bil. = billions


What is the other name of 5 galaxies?

there are millions and billions of galaxies. I will tell you 5 1:Our Milky Way galaxy 2:Cartwheel galaxy 3:Andromedia galaxy 4:Pegasus galaxy 5:Circinus