How do Scientists differentiate between Stars & Galaxies?
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How do Scientists differentiate between Stars & Galaxies?         


Author: Sanny
Date: May 9, 2008 10:12

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.

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.
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Re: How do Scientists differentiate between Stars & Galaxies?         


Author: jimp
Date: May 9, 2008 10:45

In sci.physics Sanny hotmail.com> wrote:
> When I see sky I only see small stars twinkling at night.

So far, so good.
> Now When I see sky with a large telescope I will again see many stars.

Still OK.
> How do I know whether a twinkling Object is a Star from our Galxy or
> it is some other Galaxy.

I knew it was too good to last.

Get an education. Learn some optics.

In general, stars in other galaxies are not resolveable as individual
stars.

Learn some optics.
> How do scientist see the very far away Galaxies and see Billions of
> Stars in it.

Telescopes.
> Can they really see each star in the Galaxy and how do they count that
> there are 100 Billion stars in that galaxy.

No.

Get an education. Learn some optics. Learn some math.
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(no subject)         


Author: J Jones
Date: May 9, 2008 12:15

Sanny wrote:
> 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.
>
> 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.
> ...
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How do busdrivers tell difference between tea and coffee         


Author: J Jones
Date: May 9, 2008 12:16

Sanny wrote:
> 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.
>
> 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.
> ...
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Re: How do Scientists differentiate between Stars & Galaxies?         


Author: Johnnie In The Billows
Date: May 9, 2008 12:21

On May 9, 6:12 pm, Sanny hotmail.com> wrote:
> 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.
>
> 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.
> ...
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Re: How do Scientists differentiate between Stars & Galaxies?         


Author: Sanny
Date: May 9, 2008 12:22

> There is no outside the universe.
>
>> Say our Universe Radius is "r"
>
> With a bit of reading you would know that r is currently estimated
> to be about 46 billion light years.
>
>> 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?
>
> There are no "things" beyond r.

So you know the Radius of Universe it is 46 billion light years.

We cannot see things beyond r = 46 billion light years

Since we cannot see things beyond r We assume there is nothing outside
it.

So according to you 2r, 3r, 100r, 1000r do not Exist just because we
cannot see that distance.

It is just like saying a Blind person says Since I cannot see anyone
in this world there exist no Human Beings on earth. Is it not absurd.
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Re: How do busdrivers tell difference between tea and coffee         


Author: Sanny
Date: May 9, 2008 12:24

By drinking he can tell difference between tea & cofee.

What are you drinking at the moment Tea or Cofee???

Bye
Sanny
no comments
Re: How do Scientists differentiate between Stars & Galaxies?         


Author: Uncle Al
Date: May 9, 2008 12:33

Sanny wrote:
>
> 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.

1) You look up the sky coordinates in a catalogue or use software.
2) You look at the (resolved) image. Stars don't have structure or
extent.
> How do scientist see the very far away Galaxies and see Billions of
> Stars in it.

Bifocals.
> Can they really see each star in the Galaxy and how do they count that
> there are 100 Billion stars in that galaxy.
[snip rest of crap]

103,475,223,482 stars. Oops, supernova! 103,475,223,481 stars.
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Re: How do Scientists differentiate between Stars & Galaxies?         


Author: jimp
Date: May 9, 2008 12:45

In sci.physics Sanny hotmail.com> wrote:
>> There is no outside the universe.
>>
>>> Say our Universe Radius is "r"
>>
>> With a bit of reading you would know that r is currently estimated
>> to be about 46 billion light years.
>>
>>> 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?
>>
>> There are no "things" beyond r.
> So you know the Radius of Universe it is 46 billion light years.
> We cannot see things beyond r = 46 billion light years
> Since we cannot see things beyond r We assume there is nothing outside
> it.
> So according to you 2r, 3r, 100r, 1000r do not Exist just because we
> cannot see that distance.
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why do holes have outer edges         


Author: J Jones
Date: May 9, 2008 12:56

Sanny wrote:
> 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.
>
> 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.
> ...
Show full article (1.41Kb)
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