"Sanny" wrote in message
...
When I see sky I only see small stars twinkling at night.
Now When I see sky with a large telescope I will again see many stars.
How do I know whether a twinkling Object is a Star from our Galxy or
it is some other Galaxy.
How do scientist see the very far away Galaxies and see Billions of
Stars in it.
You know how big the full moon is in the sky? It's about half a degree.
The closest galaxy to us is 2 degress across...four times the size
of the full moon. The first time you see it in a wide angle telescope
or binoculars, it looks like the finest mist you've ever seen.
With the mist being countless stars of that galaxy.
Look at this picture below. Near the very bottom center is a speck of light
within a 'cross' of light. Another near the center. Those are stars within our
galaxy, all the ..rest are galaxies. Look at the full size image for awhile, and
gaze over all the galaxies, it's the most spectacular view of the deep universe
ever made. And this image is just a tiny speck of the night sky.
http://en.wikipedia.org/wiki/Image:H...deep_field.jpg
Can they really see each star in the Galaxy and how do they count that
there are 100 Billion stars in that galaxy.
It may happen That is just a Star with a Billions of small planet
sized things.
And when we are living inside the Galaxy how do astronomers descide
that our galaxy is spiral.
As far as I know whichever direction I see I can see infinite number
of stars.
So what are they basis of these assumption?
What I bilieve is stars are randomly distributed throughout the
Universe.
And Universe is Finite or Infinite is again a Question.
Say Universe is Finite then it must have some Shape.
Lets assume it has a Shape of a Sphere.
Then That sphere must have some radius.
What happens about the place outside that sphere.
Say our Universe Radius is "r"
What are the things ar a distance 2r, 3r, 100r, 1000r. Why do we not
consider the things at a distance 1000r as part of our Universe?
Why we confine our Universe to be a Sphere of radius r ????
Bye
Sanny