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If it is taken for granted that at the earliest stage of the Big Bang expansion no elements heavier than hydrogen existed, then what is the explanation as to why these stars and galaxies involved in the Hubble constant exhibit continuous spectra?
Could this be what is seen when the Hubble shift is examined?
The strange thing about this data is that continuous spectrum of galaxy should not exist!
Quote from: McQueen on 29/05/2021 14:45:02If it is taken for granted that at the earliest stage of the Big Bang expansion no elements heavier than hydrogen existed, then what is the explanation as to why these stars and galaxies involved in the Hubble constant exhibit continuous spectra? Hot hydrogen gives a continuous spectrum, it is used in UV lamps.(Deuterium is more efficient so it is often used).https://en.wikipedia.org/wiki/Deuterium_arc_lampSince hydrogen will emit a continuous spectrum, there is nothing "mysterious" to explain.Sunlight is, of course, also proof of this- though the hydrogen is impure.Quote from: McQueen on 29/05/2021 14:45:02Could this be what is seen when the Hubble shift is examined? No.Quote from: McQueen on 29/05/2021 14:45:02The strange thing about this data is that continuous spectrum of galaxy should not exist! Why not.A galaxy is made of stars.Stars emit "white" light, just like the Sun does.
Quote from: Bored chemist on 29/05/2021 14:54:41Quote from: McQueen on 29/05/2021 14:45:02If it is taken for granted that at the earliest stage of the Big Bang expansion no elements heavier than hydrogen existed, then what is the explanation as to why these stars and galaxies involved in the Hubble constant exhibit continuous spectra? Hot hydrogen gives a continuous spectrum, it is used in UV lamps.(Deuterium is more efficient so it is often used).https://en.wikipedia.org/wiki/Deuterium_arc_lampSince hydrogen will emit a continuous spectrum, there is nothing "mysterious" to explain.Sunlight is, of course, also proof of this- though the hydrogen is impure.Quote from: McQueen on 29/05/2021 14:45:02Could this be what is seen when the Hubble shift is examined? No.Quote from: McQueen on 29/05/2021 14:45:02The strange thing about this data is that continuous spectrum of galaxy should not exist! Why not.A galaxy is made of stars.Stars emit "white" light, just like the Sun does. Surely a rather spurious argument since the same kind of absorption spectra can be used to check for the presence of other elemnents and if those don't exist, your point would be proved and it is only hydrogen that is seen.
what is the explanation as to why these stars and galaxies involved in the Hubble constant exhibit continuous spectra?
your point would be proved
distant Galaxies demonstrated a red-shift that varied linearly with distance.
What is interesting is that Hubble’s constant points an unwavering finger at the fact that the Universe probably originated from a single point...It depicts a Universe in which each star and galaxy is expanding rapidly away from a central event in every direction....what is seen is the initial shock wave racing outward at speed from the epicenter
it is possible to see that the Andromeda Galaxy is the galaxy that is closest to us.
It is located at a distance of 26.5 million light years away.
If it is taken for granted that at the earliest stage of the Big Bang expansion no elements heavier than hydrogen existed
Instead what we find is a Universe at rest, where every star seen in the time period close to the expansion process, has now, in our time reached zero expansion speeds
If the effects of a normal explosion, are examined, what is seen is the initial shock wave racing outward at speed from the epicenter and the rest of the mass of which the explosion is made settling into a cloud after the shock wave has passed.
Sounds like an "explosion", doesn't it? What's your objection to calling it that?
The only point I was making is that stars shine white.That hardly needs "proving" but it seemed to surprise you.
Quote from: charles1948 on 29/05/2021 21:38:25Sounds like an "explosion", doesn't it? What's your objection to calling it that?Explosions travel through space. The Big Bang was the rapid expansion of space itself. The distance between particles rapidly increased due to that spatial expansion, not due to their own motion through space.
Thanks, but isn't "Space" just a word for the separation between things.It seems to me, that you're saying that things got more separate, because their separation increased.Is that a satisfactory scientific explanation of the Big Bang?
Quote from: charles1948 on 30/05/2021 01:26:33Thanks, but isn't "Space" just a word for the separation between things.It seems to me, that you're saying that things got more separate, because their separation increased.Is that a satisfactory scientific explanation of the Big Bang?Yes. There is a difference between the space expanding between two objects and those two objects moving away from each other through space. Relativity recognizes this difference. Two objects can have a recession velocity due to spatial expansion greater than light relative to each other, but cannot physically move through space faster than light relative to each other.
You seem to be treating it as an actual physical "thing" which can "expand".
As far as I can see, "Space" is just a kind of shorthand linguistic expression for "how far things are separated from each other"
If so, then to assume from this, that there must be an actual "thing": - "Space" or "Separation", seems to me false. It's just an artefact of language.
Two different speeds for the same object viewed from two different distances?
Scientists have found that the Galaxies are spaced at definite, measurable distances from each other
Where did you learn that?
This is my reasoning based on your comments. The expansion of the Universe is the expansion of space itself. I would take this to mean that the Galaxies are not moving through space per se but are part of the expansion process, their position is determined by the expansion of the Universe. Surely this means that the distances between Galaxies will increase by the same factor in the same amount of time. Therefore the Galaxies are at a fixed and predetermined distance from each other.
But I still don't understand your continued use of this word "Space". You seem to be treating it as an actual physical "thing" which can "expand".