As the light required years to reached far stars ,so how can telescope can have there images in few minutes?

Answer 1

That's because those stars have been sending out their light for millions of years. Thus telescopes record the light that have reached us.

If, for example,a new star is born today, we wouldnt see it in the telescope because its light would not have reach us yet.

Answer 2

I gather what you mean is, "If light from distant stars took years to reach us, how can telescopes have images in a few minutes?"

Simple. The telescope image is the light that is only just arriving here from those stars, so what you are seeing through the telescope is the past.

If a star is 8 lightyears away (such as the star Sirius, also known as the Dog Star) you are seeing Sirius as it appeared 8 years ago, which accounts for the time the light took to cross the distance between there are here.

It is not possible for a telescope to see an image of a distance star as it appears at the present moment, because that light is only now starting it's journey to us and will not reach the telescope until several to many years from now.

As Carl Sagan in "Cosmos" said, "When you look out into space you look back into the past."

Answer 3

The light of far stars has been traveling toward the telescope for thousands of years...even before the telescope was made. That's why the light or planets we could be seeing through the telescope might not be there any more. It's taking so long for the light to get here we could be looking at something that blew up a hundred years ago, but we won't know it for another 50 years.

Answer 4

Telescopes don't see the light any sooner than we see it with out eyes, the problem is, a lot of times, even though the light is there, it's too dim for use to see with our eyes. Telescopes simply make this dim light bright enough to see. Our pupils are very small because we are day dwlling creatures and our eyes can only collect light over the area of our pupils. That's not a lot of light. A telescope, on the other hand, collects light over the area of it's aperture. This is the diameter of it's lens if it's a refractor, like Galileo's telescope, or it's mirror if it's a reflector, like the Hubble. This light is then condensed to a little point, making it bright enough for us to see.

The light from an object 200 light years away took 200 light years to arrive at the telescope.

Answer 5

Because the light from the stars has already traveled those hundred or w/e years so that you can see them, it's that light that has traveled here that you see through your telescope. So, if a star exploded today, you could still look at it for a hundred years before you even notice. Of course all the years vary on the distance of the star.

Answer 6

Speed of light works like this through a telescope, Lets say you are looking through your telescope, and you witness a super nova, it's in a Galaxy over 30 million light years away, what you are seeing is some thing that happened 30 million years ago, So in a senses your are looking into the past, cool.....

Answer 7

The telescope is an instrument that intercepts and concentrates the light that was emitted by the stars. If the star is 10 light-years away, it intercepts light that was sent by the star 10 years ago. So, what you see with the telescoe is the star as it was 10 years ago, not a few minutes ago.

Answer 8

The images are light years old. Some of those stars probably aren't even there anymore. When you look at a star, you are looking thousands of years into the past.

Answer 9

How long it took the light to get here has nothing to do with how long it takes to record it. Think of it this way. If a truck is bringing you a package and it drives for 5 hours to reach you, you can still unload the package in minutes.

Answer 10

The light required years to reach us from the stars, but sense it has finally gotten here, we see it right away.