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> NASA Telescopes Spot A Star 'Factory'
SOUL-DRIFTER
post Jul 10 2008, 05:13 PM
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This galaxy is producing about 4000 new stars per year.

http://news.yahoo.com/s/nm/20080710/sc_nm/...c1Oq9XCveAPLBIF

Your thoughts?


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post Jul 10 2008, 05:13 PM
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bart5050
post Jul 10 2008, 05:53 PM
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Cool. Forming planets and civilzation requires that the first stars produced heavy elements. Only second generation stars have rocky planets. First generation bodies were all hydrogen.

The earlier in its life the galaxy produced stars then this makes possible civilizations older.
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Fen Star
post Jul 11 2008, 02:07 AM
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I often wonder what type of planets will form around them, and if life will evolve and become sentient enough to look up and wonder whats out there, not knowing that billions of years ago a civilisation millions of light years away witnessed the birth of the sun that bore them life.....I wonder....wink.gif


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bart5050
post Jul 11 2008, 06:37 AM
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Consider that they are billions of light years from us. Right now they are seeing the Miky Way galaxy form its first generation stars. From their view our sun will not be formed for seven billion more years.
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(=-M-=)
post Jul 11 2008, 04:48 PM
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Ive thought about that before with the light reaching the telescope and time. If we are looking at a deep space object through a telescope at one power of magnification, and then look at it through a more powerful telescope, wouldn't you be looking at different things or rather points in time?

To answer that question, i would say "no" light travels at a constant speed. But deeper thought into the question and the nature of space leads me to a different answer.

It has been shown that Black holes have a lensing effect on light. Thus slowing it down, bending or lensing, and complete absorption.

Wouldn't it also be probable that something could speed light up ? per newtons third law.

Im admittedly slow in my understanding of some of this stuff, but i always consider humanity's very limited amount of knowledge when it comes to Outer Space.

Whats your thoughts ?

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bart5050
post Jul 11 2008, 07:01 PM
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QUOTE ((=-M-=) @ Jul 11 2008, 06:48 PM) *
Ive thought about that before with the light reaching the telescope and time. If we are looking at a deep space object through a telescope at one power of magnification, and then look at it through a more powerful telescope, wouldn't you be looking at different things or rather points in time?

To answer that question, i would say "no" light travels at a constant speed. But deeper thought into the question and the nature of space leads me to a different answer.

It has been shown that Black holes have a lensing effect on light. Thus slowing it down, bending or lensing, and complete absorption.

Wouldn't it also be probable that something could speed light up ? per newtons third law.

Im admittedly slow in my understanding of some of this stuff, but i always consider humanity's very limited amount of knowledge when it comes to Outer Space.

Whats your thoughts ?


Current relativity theory says light can move slower than C but nothing exceeds this. What the evidence suggest is that special circumstances can cause faster than light velocities but we have no mathmatical models to predict this. Most physicist argue that super luminal velocities are observational illusions but the evidence is mounting that it is real.

Different focal length telescopes have varying pwers of magnification. These do not change the velocity of light but bend it to different incidence angles. Also the more you magnify something the lower the light level becomes. This is because you are spreading the photons over a larger area so the density goes down. Aberration error in the lens becomes a limiting factor as well.

Generally what is observed is light moves at C velocities in all frames of refernce. If you are moving towards a light source at high speed the velocity is C but the frequency of the light is blue shifted. Moving away the frequency is red shifted to a lower frequency. This is the dopplar effect. Red shift in distant galaxies shows the universe to be expanding at an increasing velocity. This is not fully understood so dark ebergy is proposed as causing the acceleration.
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